Pygame - Pygame is a set of Python modules designed for writing games.
CKEditor - Real-time collaborative future-ready rich text editor
Unity - The multiplatform game creation tools for everyone.
Summernote - Summernote is a JavaScript library that helps users create WYSIWYG editors online.
Grit Game Engine - The Grit Game Engine is an MIT-Licensed Open Source Game Engine that is highly scriptable via Lua.
Froala Editor - Froala Editor is a WYSIWYG HTML editor that enables rich text editing capabilities for the applications.