Lunar Magic - Lunar Magic is a level editor created for Super Mario World.
Xmind - Xmind is a brainstorming and mind mapping application.
CompactGUI - CompactGUI is a standalone GUI to make using the Windows 10 compact.exe function easier to use.
MindMeister - Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
SMB Title Screen Editor - A title screen editor for Super Mario Bros. GUI is in Japanese. English readme created by AP.
Coggle - Coggle is a simple, beautiful, powerful way of structuring information.