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.

Create, review and deploy code together with GitLab open source git repo management software | GitLab

GitBucket is the easily installable open-source GitHub clone written with Scala.

Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.

A painless self-hosted Git service

SourceForge is a web-based source code repository.

Launchpad

Kiln is a complete source control management system based on Git and Mercurial.

Gitweb is a git web interface written in Perl.

SourceGear Vault Pro is a version control and bug tracking solution for professional development teams. Vault Standard is for those who only want version control.

Kallithea, a free software source code management system supporting two leading version control systems, Mercurial and Git.

Set up your own self hosted git server on IIS for Windows.