Desmos is a well known Graphing Calculator available for the web and mobile, but no desktop port exist.
Desmos Offline Mode is a desktop port of Desmos Web Version, with the added feature of working offline.
I graduated from university and will be working on this (hopefully) weekly, you can see the development being made on the develop branch.
Source has been archived under the tag archive/main. To build v1.0.0 clone the repo and then do git checkout archive/main. Follow the instructions in the REAME.md file in the archive to continue.
After the release of v1.0.0, I contacted desmos support to see if they were cool with the thing. Support said they can't give permission and to not host their code on GitHub. I thought next update was gonna release sooner but it's more than a year later and still haven't finished due to University and other issues. So I decided to finally remove the code to honor the respectful desmos support team.
I am working on the next release this is not a dead project and I'll try to contact desmos again once the next update releases with all it's changes.