Sourcegraph - 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+.
Gitea - A painless self-hosted Git service
OpenGrok - OpenGrok is a fast and usable source code search and cross reference engine.
Bonobo Git Server - Set up your own self hosted git server on IIS for Windows.
GrepCode - GrepCode.com is a code search engine built by developers for developers to search and browse open...
GitBucket - GitBucket is the easily installable open-source GitHub clone written with Scala.