Not sure if it's correct to post here, but here are some of my gamestudio tools that I stopped working on(sorry for bad quality):

Node based shader editor:
https://www.youtube.com/watch?v=sOD-ij7Gg44

Custom GUI(based on IMGUI(gui-elements do not store data):
https://www.youtube.com/watch?v=lk2JZ6bL2iQ

Path editor(with bezier-curves etc.:
https://www.youtube.com/watch?v=O07tSEez7sc