LiteIDE is a simple, open source, cross-platform IDE.
LiteIDE provides you a simple GO code editor tool. LiteIDE lets you create new projects, clean their code but also run and debug them.
The RadioPlayer add-on is cross-platform and it works on Mac OS X, Windows and Linux.
Blinged JSON Validator is a free app to validate JSON files with syntax highlighting, whitespace indentation, error messaging, and hotkeys.