Conky Manager is a GUI that allows you to easily manage Conky configurations. The latest version - 1.1 -, lets you choose from 7 such configurations / themes.
Portal, the popular first-person puzzle game developed by Valve, has moved out of beta and is now officially supported on Linux.
ffDiaporama is an application written in Qt, available for Linux and Windows, that allows you mix videos, music, text and photos to create movie clips / slideshows. The application supports adding animations such as zoom, rotation or Ken Burns Effect, add titles (text), annotations and more.
Gufw, a firewall that uses UFW (Uncomplicated Firewall) under the hood, has been updated recently, getting a new layout and some important new features.
8 of the themes included in the pack support Xfwm4 too: