UbuTricks is a small utility that helps installing various games and applications on Ubuntu or Mint. It's a small shell wrapper with a xdialog/zenity GUI. It supports various installation schemes (PPA updating, DEB installation, source compilation, portable setups, and custom archive unpacking). It includes for instance 0 A.D., Battle for Wesnoth (Dev), SMPlayer, Ubuntu Tweak, Cinnamon, Wine, Geary, Google Earth, Kdenlive, PlayOnLinux, LXQt, QupZilla
LazAutoUpdate provides a GUI to manage project updates from files and binaries that are hosted on Sourceforge. It provides an application API which can download and install application updates.