GitHub Gist - Gist is a simple way to share snippets and pastes with others.
Zeal - Zeal is an API Documentation Browser.
SnippetsLab - SnippetsLab is an easy-to-use snippets manager.
DevDocs - Open source API documentation browser with instant fuzzy search, offline mode, keyboard shortcuts, and more
massCode - A free and open source code snippets manager for developers.
Snippely - Snippely is a basic text and code organizational tool.