Recs.
Updated
SpecsUpdate
Pros
Pro Open source
The GitLab software itself is available under an open source license. It's even mirrored on GitHub.
Pro Integrates fully with LDAP
The Lightweight Directory Access Protocol is an application protocol for accessing and maintaining distributed directory information services over an Internet Protocol (IP) network.
GitLab EE adds additional functionality over CE such as support for multiple LDAP servers and group sync.
Pro Good web UI
GitLab's UI is clean and intuitive. Each view is designed to not fill the screen with useless information.
It displays the activity in a feed-type way in the most prominent part of the view. On top of that, there's a toolbar with buttons which can filter this feed by pushes, merge events or comments.
On the left, there's a menu that displays all the links that take you to the different views. For example, a file directory which displays all the files in that repo, a commit view which displays all the commits in cronological order, a network and a graph view that display important information graphically etc...
All these details make GitLab's UI extremely intuitive and easy to use, no view is overflown with information and every view displays only the most useful and crucial information needed at that time.
Pro Has free self-hosted and hosted solutions as well as an Enterprise version
GitLab has three versions available.
First, there's Community Edition - a free and open source self-hosted version with packages for Debian, Ubuntu and CentOS machines. It's licensed under MIT with code available here.
Then there's Enterprise Edition - a self-hosted solution that adds proprietary features on top of Community Edition that improve integrations with other tools, server management options, workflow management and authentication and authorization integration and starts at $19.90/user/year.
Self-hosted solution are great for keeping data private.
For more information about GitLab's self-hosted features.
Finally, there's a hosted solution that offers both public and private repositories for free.
Cons
Con Difficult to install
There are 6 official ways to install Gitlab, as well as 7 one-click install links, and even 8 community installation methods. Choosing the right one for you, and following all the required steps can be a hassle. You can view the official installation website here.