PhilterBlog has posted a quite extensive list of Flash MX component resources.
You can view the list here.
I also put together a comprehensive list of component resources, which no longer as comprehensive, is still very useful.
You can view my weblog post listing component resources here.
Hmm, maybe it is time to get something like this up on the DevNet center. If you know of any resources that I or Philterblog missed, please list them in the comments.