I am building my own OS which is called D.eSystem, my current version is D.eSystem 6.0.2 beta, The newest version features a lot of bugfixes and D.eSystem already features a GUI,a calculator app,a small shell and a Clock app.

Find D.eSystem 6.0.2 beta here: https://github.com/D-electronics-scratch/-all_D.eSystem_versions/releases/tag/v.6.0.6_alpha