Here are some resources we've found useful so far:

• Good resources for people new to git:
  • Official Git Tutorial
  • Git Ready
  • ProGit Online Book
  • Git Community Book
• IDE Plugins
  • Eclipse
    • EGit Plugin
  • IntelliJ IDEA
    • Bundled Git Support
    • GitHub Integration
  • Vim
    • fugitive.vim
• Other good stuff:
  • Tig - NCurses Frontend
  • Git Achievements Example Site