wtf do these Vala repos do?

Popular Vala repositories on GitHub, each decoded: what it actually does, its stack, and how to run it.

phw/peekPeek is a deprecated Linux screen recorder for capturing a small area of your screen as an animated GIF or Web
teejee2008/timeshiftTimeshift is a Linux system restore tool that takes periodic snapshots of OS files using rsync or BTRFS, letti
christianloopp/komorebiA Linux desktop wallpaper manager that lets you set animated wallpapers using images, videos, or web pages, wi
byoval/purcleanPurclean is a graphical disk-cleaning app for Fedora Linux that removes old kernel files, package caches, brow