Open Source Window Managers

FVWM - Crystal aims to create an easy to use, eye-candy but also powerful desktop environment for Linux or other Unix-like operating systems. Its goals include seeking for better ways of using window manager and providing it with eyecandy interface. It try to exercise FVWM quite a bit. It has some very interesting features unique to Linux/Unix desktops like direct controls for several media players and its ability to bring in full screen virtualy any application. It can flow through the full screened applications and the desktop in a manner similar to the application stack of the Amiga OS, which provides an innovative way to go around the desktop space, without compromising traditional X multiple desktop pages. The core code was written by harnir Maciej Delmanowski with contributions from many other folks. The current developments are led by Dominique Michel.

Wally is a Qt4 wallpaper / background changer, using multiple sources like files, folders, FTP remote folders, Flickr, Panoramio, Ipernity, Photobucket, Buzznet, Picasa, Smugmug, Google, Vladstudio and deviantART images.

Provides battery,temperature,ac,cpufreq (SpeedStep,Powernow!) control and monitoring. Proper suspend to disk/ram and standby by shell hooks that are easy to extend. APM and ACPI machines are supported equally. For laptops as well as for workstations.

MailChecker is a simple system tray email notifier. It handles multiple accounts and supports AOL, Gmail, etc... and many more webmail services with IMAP enabled. It has a simple easy-to-use user interface and configuration panel.