Snipper.ml - A simple snippet manager in the menubar
Gisto - Code snippet manager that runs on GitHub Gist
Snipline - Command-line snippet organiser for power users
PasteCloud - Store pieces of text or code and share it with everyone.
CodeMyUI - Handpicked code snippets you can use in your web projects
glot.io - An open source pastebin with runnable snippets and API