All Things Git: Posh Git with Keith Dahlby
"... a nine-time C# MVP ... His open source efforts include posh-git, a git environment for PowerShell, Griddle, a grid component for React, and up-for-grabs.net, a site featuring open source projects looking to mentor new contributors. He was also a core contributor to LibGit2Sharp."
posh-git also provides tab completion support for common git commands, branch names, paths and more."
Up For Grabs
"This is a list of projects which have curated tasks specifically for new contributors. These are a great way to get started with a project, or to help share the load of working on open source projects."