I don't understand why people aren't using Fossil[1]. It's still simple, while maintaining a consistent and sensible user interface. It might not be as flexible, but the repos are just sqlite databases, and Sqlite can be called from almost any language, so there's huge potential for custom tools that solve a specific use-case etc. It's main advantage, though, is that it's about much more than just code. Issues (called tickets), Wikis or even Forums can be a part of your repo. That means there's absolutely no vendor lock in. In fact, you can host your repos by just SCPing a repo file to a public server. You can also collaborate on issues offline etc. It's written by the Sqlite guy, so it's highly reliable and well documented, upto the technical details like file formats etc. It's designed so that repos can last for hundreds of years. The C code is also of very high quality.