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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Square Open Source</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0">
<link href="/assets/base.css" media="screen" rel="stylesheet" type="text/css" />
<link rel="shortcut icon" href="/assets/public/favicon.ico" />
<script src="/assets/modernizr.js" type="text/javascript"></script>
</head>
<body>
<div class="wrapper">
<div class="profile">
<section class="profile-masthead" id="masthead">
<header class="profile-logo">
<div class="profile-logo-image">
<img alt="Square Open Source " src="/images/logo.png" />
</div>
<div class="profile-name">
<h1>Square Open Source</h1>
</div>
</header>
<aside class="profile-summary">
<div class="summary-location summary-module">
<a href="http://github.com/square">github.com/square</a>
</div>
</aside>
</section>
<section class="profile-content" id="content">
<!-- TODO header? -->
<div class="profile-description">
<p>As a company built on open source, here are some of the internally-developed libraries we have contributed back to the community.</p>
</div>
<article class="profile-menu" id="menu">
<nav class="menu-navigation">
<ul class="menu-navigation-list">
<li class="menu-navigation-list-item"><a href="#android">Android</a></li>
<li class="menu-navigation-list-item"><a href="#c">C</a></li>
<li class="menu-navigation-list-item"><a href="#go">Go</a></li>
<li class="menu-navigation-list-item"><a href="#ios">iOS</a></li>
<li class="menu-navigation-list-item"><a href="#java">Java</a></li>
<li class="menu-navigation-list-item"><a href="#javascript">JavaScript</a></li>
<li class="menu-navigation-list-item"><a href="#kotlin">Kotlin</a></li>
<li class="menu-navigation-list-item"><a href="#ruby">Ruby</a></li>
<li class="menu-navigation-list-item"><a href="#other">Other</a></li>
</ul>
</nav>
<div id="android" class="menu-category">
<h3 class="menu-category-name">Android</h3>
<ol class="menu-category-list has-images">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">android-times-square</h4>
<span class="menu-item-price"><a href="https://github.com/square/android-times-square" target="_blank">GitHub</a></span>
<p class="menu-item-description">Standalone Android widget for picking a single date from a calendar view.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/android-times-square.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">assertj-android</h4>
<span class="menu-item-price"><a href="http://square.github.io/assertj-android/" target="_blank">Website</a> · <a href="https://github.com/square/assertj-android" target="_blank">GitHub</a></span>
<p class="menu-item-description">A set of AssertJ helpers geared toward testing Android.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/assertj-android.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">leakcanary</h4>
<span class="menu-item-price"><a href="https://square.github.io/leakcanary" target="_blank">Website</a> · <a href="https://github.com/square/leakcanary" target="_blank">GitHub</a></span>
<p class="menu-item-description">LeakCanary is a memory leak detection library for Android.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/leakcanary.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">moshi</h4>
<span class="menu-item-price"><a href="http://square.github.io/moshi/1.x/moshi/" target="_blank">Website</a> · <a href="https://github.com/square/moshi" target="_blank">GitHub</a></span>
<p class="menu-item-description">A modern JSON library for Kotlin and Java.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/moshi.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">okhttp</h4>
<span class="menu-item-price"><a href="http://square.github.io/okhttp/" target="_blank">Website</a> · <a href="https://github.com/square/okhttp" target="_blank">GitHub</a></span>
<p class="menu-item-description">An HTTP client for Android, Kotlin, and Java.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/okhttp.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">okio</h4>
<span class="menu-item-price"><a href="https://square.github.io/okio/" target="_blank">Website</a> · <a href="https://github.com/square/okio" target="_blank">GitHub</a></span>
<p class="menu-item-description">A modern I/O library for Android, Kotlin, and Java.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/okio.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">picasso</h4>
<span class="menu-item-price"><a href="http://square.github.io/picasso/" target="_blank">Website</a> · <a href="https://github.com/square/picasso" target="_blank">GitHub</a></span>
<p class="menu-item-description">A powerful image downloading and caching library for Android</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/picasso.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">pollexor</h4>
<span class="menu-item-price"><a href="http://square.github.io/pollexor/" target="_blank">Website</a> · <a href="https://github.com/square/pollexor" target="_blank">GitHub</a></span>
<p class="menu-item-description">Java client for the Thumbor image service which allows you to build URIs in an expressive fashion using a fluent API.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/pollexor.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">retrofit</h4>
<span class="menu-item-price"><a href="http://square.github.io/retrofit/" target="_blank">Website</a> · <a href="https://github.com/square/retrofit" target="_blank">GitHub</a></span>
<p class="menu-item-description">Type-safe HTTP client for Android and Java by Square, Inc.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/retrofit.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">spoon</h4>
<span class="menu-item-price"><a href="http://square.github.io/spoon/" target="_blank">Website</a> · <a href="https://github.com/square/spoon" target="_blank">GitHub</a></span>
<p class="menu-item-description">Distributing instrumentation tests to all your Androids.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/spoon.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">wire</h4>
<span class="menu-item-price"><a href="https://square.github.io/wire/" target="_blank">Website</a> · <a href="https://github.com/square/wire" target="_blank">GitHub</a></span>
<p class="menu-item-description">Clean, lightweight protocol buffers for Android and Java.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/wire.jpg" />
</div>
</li>
</ol>
<ol class="menu-category-list">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">seismic</h4>
<span class="menu-item-price"><a href="https://github.com/square/seismic" target="_blank">GitHub</a></span>
<p class="menu-item-description">Android device shake detection.</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">sqldelight</h4>
<span class="menu-item-price"><a href="https://github.com/square/sqldelight" target="_blank">GitHub</a></span>
<p class="menu-item-description">Generates typesafe Kotlin APIs from SQL</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">tape</h4>
<span class="menu-item-price"><a href="http://square.github.io/tape/" target="_blank">Website</a> · <a href="https://github.com/square/tape" target="_blank">GitHub</a></span>
<p class="menu-item-description">A lightning fast, transactional, file-based FIFO for Android and Java.</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">workflow</h4>
<span class="menu-item-price"><a href="https://square.github.io/workflow" target="_blank">Website</a> · <a href="https://github.com/square/workflow" target="_blank">GitHub</a></span>
<p class="menu-item-description">A library for making composable state machines, and UIs driven by those state machines.</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">anvil</h4>
<span class="menu-item-price"><a href="https://github.com/square/anvil" target="_blank">GitHub</a></span>
<p class="menu-item-description">A Kotlin compiler plugin to make dependency injection with Dagger 2 easier.</p>
</div>
</li>
</ol>
</div>
<div id="c" class="menu-category">
<h3 class="menu-category-name">C</h3>
<ol class="menu-category-list has-images">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">subzero</h4>
<span class="menu-item-price"><a href="https://github.com/square/subzero" target="_blank">GitHub</a></span>
<p class="menu-item-description">Square's Bitcoin Cold Storage solution.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/subzero.jpg" />
</div>
</li>
</ol>
</div>
<div id="go" class="menu-category">
<h3 class="menu-category-name">Go</h3>
<ol class="menu-category-list has-images">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">beancounter</h4>
<span class="menu-item-price"><a href="https://github.com/square/beancounter" target="_blank">GitHub</a></span>
<p class="menu-item-description">Utility to audit the balance of Hierarchical Deterministic (HD) wallets. Supports multisig + segwit wallets.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/beancounter.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">subzero</h4>
<span class="menu-item-price"><a href="https://github.com/square/subzero" target="_blank">GitHub</a></span>
<p class="menu-item-description">Square's Bitcoin Cold Storage solution.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/subzero.jpg" />
</div>
</li>
</ol>
<ol class="menu-category-list">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">certigo</h4>
<span class="menu-item-price"><a href="https://github.com/square/certigo" target="_blank">GitHub</a></span>
<p class="menu-item-description">A utility to examine and validate certificates in a variety of formats</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">certstrap</h4>
<span class="menu-item-price"><a href="https://github.com/square/certstrap" target="_blank">GitHub</a></span>
<p class="menu-item-description">Tools to bootstrap CAs, certificate requests, and signed certificates.</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">ghostunnel</h4>
<span class="menu-item-price"><a href="https://github.com/square/ghostunnel" target="_blank">GitHub</a></span>
<p class="menu-item-description">A simple SSL/TLS proxy with mutual authentication for securing non-TLS services</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">go-jose</h4>
<span class="menu-item-price"><a href="https://github.com/square/go-jose" target="_blank">GitHub</a></span>
<p class="menu-item-description">An implementation of JOSE standards (JWE, JWS, JWT) in Go</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">gssh</h4>
<span class="menu-item-price"><a href="https://github.com/square/gssh" target="_blank">GitHub</a></span>
<p class="menu-item-description">simple command line to utility to run commands on multiple hosts in parallel</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">metrics</h4>
<span class="menu-item-price"><a href="https://github.com/square/metrics" target="_blank">GitHub</a></span>
<p class="menu-item-description">Metrics Query Engine</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">squalor</h4>
<span class="menu-item-price"><a href="https://github.com/square/squalor" target="_blank">GitHub</a></span>
<p class="menu-item-description">Go SQL utility library</p>
</div>
</li>
</ol>
</div>
<div id="ios" class="menu-category">
<h3 class="menu-category-name">iOS</h3>
<ol class="menu-category-list has-images">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">PonyDebugger</h4>
<span class="menu-item-price"><a href="https://github.com/square/PonyDebugger" target="_blank">GitHub</a></span>
<p class="menu-item-description">Remote network and data debugging for your native iOS app using Chrome Developer Tools</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/PonyDebugger.jpg" />
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">spacecommander</h4>
<span class="menu-item-price"><a href="https://github.com/square/spacecommander" target="_blank">GitHub</a></span>
<p class="menu-item-description">Commit fully-formatted Objective-C as a team without even trying.</p>
</div>
<div class="menu-item-image has-meta-content">
<img src="/repo_images/spacecommander.jpg" />
</div>
</li>
</ol>
<ol class="menu-category-list">
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">Aardvark</h4>
<span class="menu-item-price"><a href="https://github.com/square/Aardvark" target="_blank">GitHub</a></span>
<p class="menu-item-description">Aardvark is a library that makes it dead simple to create actionable bug reports.</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">Ackbar</h4>
<span class="menu-item-price"><a href="https://github.com/square/Ackbar" target="_blank">GitHub</a></span>
<p class="menu-item-description">Testable debug assertions for Swift.</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">Cleanse</h4>
<span class="menu-item-price"><a href="https://github.com/square/Cleanse" target="_blank">GitHub</a></span>
<p class="menu-item-description">Lightweight Swift Dependency Injection Framework</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">sqldelight</h4>
<span class="menu-item-price"><a href="https://github.com/square/sqldelight" target="_blank">GitHub</a></span>
<p class="menu-item-description">Generates typesafe Kotlin APIs from SQL</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">SuperDelegate</h4>
<span class="menu-item-price"><a href="https://github.com/square/SuperDelegate" target="_blank">GitHub</a></span>
<p class="menu-item-description">SuperDelegate provides a clean application delegate interface and protects you from bugs in the application lifecycle</p>
</div>
</li>
<li class="menu-item">
<div class="menu-item-info">
<h4 class="menu-item-name">Valet</h4>
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<p class="menu-item-description">Valet lets you securely store data in the iOS, tvOS, or macOS Keychain without knowing a thing about how the Keychain works. It’s easy. We promise.</p>
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<h4 class="menu-item-name">okhttp</h4>
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<p class="menu-item-description">An HTTP client for Android, Kotlin, and Java.</p>
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<h4 class="menu-item-name">okio</h4>
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<p class="menu-item-description">A modern I/O library for Android, Kotlin, and Java.</p>
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<p class="menu-item-description">Java client for the Thumbor image service which allows you to build URIs in an expressive fashion using a fluent API.</p>
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<p class="menu-item-description">Type-safe HTTP client for Android and Java by Square, Inc.</p>
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<p class="menu-item-description">Clean, lightweight protocol buffers for Android and Java.</p>
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<p class="menu-item-description">A Java API for generating .java source files.</p>
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<p class="menu-item-description">A system for distributing and managing secrets</p>
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<p class="menu-item-description">Cube: A system for time series visualization.</p>
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<p class="menu-item-description">Cubism.js: A JavaScript library for time series visualization.</p>
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<p class="menu-item-description">Tomorrow’s JavaScript module syntax today</p>
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<p class="menu-item-description">JavaScript library to encrypt/decrypt data in JSON Web Encryption (JWE) format and to sign/verify data in JSON Web Signature (JWS) format. Leverages Browser's native WebCrypto API.</p>
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<p class="menu-item-description">A Kotlin API for generating .kt source files.</p>
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<p class="menu-item-description">LeakCanary is a memory leak detection library for Android.</p>
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<h4 class="menu-item-name">okhttp</h4>
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<p class="menu-item-description">An HTTP client for Android, Kotlin, and Java.</p>
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<div class="menu-item-image has-meta-content">
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<p class="menu-item-description">A modern I/O library for Android, Kotlin, and Java.</p>
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<p class="menu-item-description">Type-safe HTTP client for Android and Java by Square, Inc.</p>
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<p class="menu-item-description">Clean, lightweight protocol buffers for Android and Java.</p>
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<p class="menu-item-description">Generates typesafe Kotlin APIs from SQL</p>
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<h4 class="menu-item-name">workflow</h4>
<span class="menu-item-price"><a href="https://square.github.io/workflow" target="_blank">Website</a> · <a href="https://github.com/square/workflow" target="_blank">GitHub</a></span>
<p class="menu-item-description">A library for making composable state machines, and UIs driven by those state machines.</p>
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<h4 class="menu-item-name">anvil</h4>
<span class="menu-item-price"><a href="https://github.com/square/anvil" target="_blank">GitHub</a></span>
<p class="menu-item-description">A Kotlin compiler plugin to make dependency injection with Dagger 2 easier.</p>
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<p class="menu-item-description">BorderPatrol lets you import a KML file and then check if points are inside or outside the polygons the file defines.</p>
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<h4 class="menu-item-name">cane</h4>
<span class="menu-item-price"><a href="https://github.com/square/cane" target="_blank">GitHub</a></span>
<p class="menu-item-description">Code quality threshold checking as part of your build</p>
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<p class="menu-item-description">Extract, Transform, and Load data with Ruby</p>
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<p class="menu-item-description">jet.pack: package your JRuby rack app for Jetty.</p>
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<p class="menu-item-description">String extraction, translation and export tools for the 21st century. "Moving strings around so you don't have to"</p>
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<p class="menu-item-description">Chrome extension that linkifies JIRA ticket numbers on select pages.</p>
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<p class="menu-item-description">shift is an application that helps you run schema migrations on MySQL databases</p>
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