Quiver - Quiver is a notebook built for programmers.

You Need A Wiki - Create a wiki with Google Docs

GitHub Gist - Gist is a simple way to share snippets and pastes with others.

Stack Overflow Documentation - A crowdsourced developer documentation

Simple Snippets - Simple Snippets is place to easily create and manage your code snippets. The main features of the Simple Snippets: code highlighting, snippet groups, public and private snippets.

Greenboard - Generate beautiful static api documentation