OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
GrepCode - GrepCode.com is a code search engine built by developers for developers to search and browse open...
Krugle - Krugle is the complete enterprise solution for search targeted to the development organization.
Snip2Code.com - Snip2Code is a free service that lets users search, share and collect code snippets, the basic...
Insight.io - Best web-based IDE-like source code browsing and search tool
searchcode - A source code search engine