What are some alternatives?
When comparing SmartGit and tig, you can also consider the following products
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
SourceTree - Mac and Windows client for Mercurial and Git.
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.
git-cola - git-cola is a powerful GUI for git, a distributed revision control system.
TortoiseGit - TortoiseGit is an easy to use client for the Git distributed revision control system.
Magit - Front-end to the git revision control system for emacs.