If you’ve been keeping up with HN the past day or so there have been a bunch of great discussion around alternatives

• Kallithea
• Phabricator
• GitTorrent
• GitHub
• Gitea
• Pagure
• ReviewBoard
• GitBucket
• Tuleap

Recap of the competition: Self Hosted (in order of anecdotal popularity) - Gitlab - Gitea (fork of Gogs) - Gogs - Phabricator - GitBucket - Rhodecode - Kalithea (fork of Rhodecode) - GitPrep - Allura - GitSSB - Pagure

If you want hosted Git, there are many competitors, but some of the notable are - Gitlab - Attlassian BitBucket - Google Cloud Repositories - Amazon CodeCommit - Canonical Launchpad - Sourceforge

All of which assume you want git, but other DVCSs are Mercurial (which is supported by a number of the above servers) and Fossil.