DeepGit : DeepGit is a tool to investigate the history of source code. It combines Git Blame and Log information and makes it easy to trace changes to a line or...
pre-commit : A framework for managing and maintaining multi-language pre-commit hooks.
Gerrit : Web based code review and project management for Git based projects.
Gitea : Gitea is a community managed fork of Gogs, lightweight code hosting solution written in Go and published under the MIT license.
Git Extensions is the only graphical user interface for Git that allows you control Git without using the commandline. It comes with a manual and video tutorials to get you started quickly.