GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
XP-Dev.com - XP-Dev.com provides commercial grade Subversion Hosting (SVN Hosting) and Project Management tools.
ProjectLocker - ProjectLocker offers managed code hosting solutions.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.
Heroku - Agile deployment platform for Ruby, Node.js, Clojure, Java, Python, and Scala. Setup takes only minutes and deploys are instant through git. Leave tedious server maintenance to Heroku and focus on your code.
Codekeeper - Source code escrow for developers