I've just started working on a set of Flex components which I call Flex Components Pack. I've only managed to make 11 components till now but I'm still working and have a lot of ideas on my to-do list. If any one of you is willing to help I would be very glad to get an extra brain in here. Just drop me a comment or something and I'll share the road-map and SVN path with you.
(13/06/2009) - Added 5 more components. A simple but nice led light switch and 4 visualisation effects (EQTunnel, EQLine, EQWave, EQBars - winamp style). Just drag and drop the EQ on your app and it will animate any running sound inside your flash.