plasma-mpc is a simple yet effective MPD ( Music Player Daemon) clie...
Darkstat Plasma Applet is a simple KDE4 applet to display darkstat...
Prayertimes is a plasmoid that tells Islamic prayer times in KDE 4.
CoreMoid is a simple but usefull plasmoid to set the CPU frequency.
BbalL plasmoid is actually a little distraction for Plasma.
Cineplex21 is a plasmoid that makes use of Cineplex21 Data engine.