This brought me a wave of nostalgia for the old Qbasic "operating system" projects, of which there were many. This site has a lot of reviews and screenshots:
http://qbasicgui.datacomponents.net/
Ans this site has more
It was a popular style of project. Some even implemented their own programming languages so they could multitask applications written for them by running lines from each app in a round-robin fashion.