Welcome to babun - the Windows shell you will love!
You have got a lot of things under the hood here!

pact -> a package manager that handles installation of babun packages
pact install tar -> will install tar package on your system
pact remove tar -> will remove tar package from your system

babun -> a script that manages babun and enables auto-update
babun check -> will check the configuration (proxy, connection, etc)
babun update -> will update babun to the newest version
babun --welcome -> will display this message again

There is a couple of plugins installed by default: oh-my-zsh, pact, cacert, etc.
There is also a lot of dev tools such as git, svn, unix utils, etc
If you would like to contribute, code up a plugin or report an issue just
go to github: https://github.com/babun/babun

If you like the project star it on github and follow me on twitter!
This project is created and maintained by Tom Bujok (@tombujok)

Welcome to babun