Alioth moving toward pagure

(full disclosure: I am the main author of RocketGit)

Another alternative is RocketGit (https://rocketgit.com).
It is very light, the code is very easy to understand (PHP, no classes), it is fast, has very powerful rights system and offers a way to easy contribute to a hosted project (anonymous push).
It has continuous integration and deployment features (for now only KVM based), but docker is in progress.

Also, it is the only AGPL (Affero GPL) project (= nobody can steal your contributions to RocketGit to make them proprietary).

It is available online, as a virtual image (200MiB) or as a docker container.

Here is my (incomplete) comparison between RocketGit, GitLab CE, GitHut, Gitolite, Pagure and Gogs:
https://rocketgit.com/op/doc/compare

Thanks!