The Command Line
Free - GPL v2
Free to use. Source not available. Sourcetree is a full featured and free Git UI for both Mac and Windows that provides an interface for pretty much everything you can do in the...
Tower 2 offers a clean and powerful GUI for MacOS and Windows
$79/user. Free for non-commercial use.
Free - GPL v2 or later. Text-mode Git repo viewer.
fugitive (via vim)
Free - VIM license
Free - MIT license
vimagit (via vim)
Get the the best of magit interactive workflow within vim.
SublimeGit (via Sublime Text)
Proprietary license, source not available