Xfce - Xfce is a lightweight desktop environment for UNIX-like operating systems. It aims to be fast and low on system resources, while still being visually appealing and user friendly.
Caffeine for Linux - Inspired by the Mac OS X version, Caffeine for Linux is a status bar application able to...
LXDE - Why will you like it? Less resource needs. You can use it on your less-pricey embedded board or salvaged computer. Component-based design. Don't want something in LXDE, or you don't want to use LXDE but only part of it?
Caffeine for Windows - Prevent your computer from going to sleep
KDE Plasma Desktop - Plasma Workspaces is the umbrella term for all graphical environments provided by KDE.
noblackout - Disables screensaver and powersaving while running programms from a choosen directory.