1. JE

    Java examples in open source code.

  2. zGrepCode.com is your helper to browse open source code online.

  3. OpenGrok is a fast and usable source code search and cross reference engine.

  4. Snip2Code is a free service that lets users search, share and collect code snippets, the basic...

  5. GrepCode.com is a code search engine built by developers for developers to search and browse open...

  6. Codase is the leading source code search company with advanced source code understanding and xml...

  7. Sourcegraph is a free, self-hosted code search and intelligence server that helps developers find, review, understand, and debug code. Use it with any Git code host for teams from 1 to 10,000+.

  8. With FishEye you can search code, visualize and report on activity and find for commits, files, revisions, or teammates across SVN, Git, Mercurial, CVS and Perforce.

  9. Krugle is the complete enterprise solution for search targeted to the development organization. 

  10. The code snippet organizer for professional developers.