Sitaramc/gitolite. Nice little tool for easily setting up repositories that others should also have access to - management is done through a dedicated admin repository.
versionsverwaltung
git-annex. Interesting plugin for git with which you only manage the metadata of large files, but not their actual contents in git. The files themselves are managed as normal external files, but the directory structures and references are correctly versioned - and all this together with normally versioned files. This bypasses the problem that git has with large files. And thus something like a photo archive based on git becomes possible.
Installing gitorious on Ubuntu 10.04. Hmm - I already have an Apache2 with SSL running for my Wordpress administration. And I've also set up a DAV server for document synchronization (in case MobileMe is replaced by iCloud and loses the iDisk in the process). Besides, it's sensible anyway, because the iDisk is so slow. I could also install my own Gitorious there and put my own repositories on it. Just blogged about it, but I should really take a closer look at it.
Sync BitBucket and GitHub - Ramanas Blog. If I ever want to switch, or simply want to provide repositories for both git and bitbucket, this could be helpful. Also just to convert repositories.
Issue Bucket. There is also a BitBucket client for iOS, but it is riddled with iAds and unfortunately very limited in features. And it looks more like a finger exercise in surface design - very plain, one could almost say "loveless". But at least you can get to the most important things to look at and it costs nothing.
iOctocat is your GitHub companion for the iPhone and iPod Touch. GitHub is becoming increasingly interesting - there is also an interesting GitHub client for iOS. And it is Open Source.
SourceTree | Mercurial and Git GUI for Mac OS X. That looks really good - although 45 euros is not exactly cheap. However, it can handle Git, Mercurial, and Subversion, so maybe I should take a look at it (there is a free trial version). Update: Short test by me and I really like it - you can integrate external diff tools (Changes is unfortunately only supported as a diff, not directly as a merge) and always have the same interface, regardless of which server is behind it. This takes away some of the pain of Git. Version tools are included internally, so you don't even need to have the command line versions installed. Looks really interesting.
GitHub for Mac. I'm a convinced Bitbucket user because of Mercurial, but this thing looks really good, you could easily switch to git just because of the interface. I'm often a mouse pusher and optics clicker underneath it all.
Shedding Bikes: Github's Favorite Joke. Why social networks in combination with code and geeks quickly become asocial networks. One reason why I also keep my distance from Github - I have an account there to set favorites and make bug reports, but I prefer to host my projects on Bitbucket. And even then, I'm very glad that Mercurial (as well as Git) as a distributed version system allows me to switch to other systems or switch to self-hosted sites (Rhodecode would be useful to install in the long run). Update: Github reacts and finally builds in blocking.
A successful Git branching model » nvie.com. Not entirely uninteresting article about distributed version control and branching/merging. Ok, it specifically addresses git and its commands, but the overviews and considerations apply to many points equally to Mercurial and in the deviations the problems are similar enough that the article remains worth reading.