So I've been spending the past few months cooking up an 'OS' in Godot. So far It's coming along very well! I wanted to share a screenshot and a video of what it looks like so far! The name is not final, but here it is!
Image: 
Video:
A few different features it currently has is external app support, a working window system (closing, minimizing, maximizing), multiple app instances open at once, and an app downloader (as seen above). Doesn't seem like much to me but it's been a lot of hard work! Thanks to the help from the people at discord btw! They've been a big help in this project's programming!