FFusion
FFmpeg-based decoded component for Apple QuickTime
...For now it is based on libavcodec v52, as is Perian; the goal is to port it to use the current libavcodec, and then
to build it for win32 QuickTime. In hope it'll improve playback performance for mp4, h264, etc. files.
The source is hosted on GitHub, the SourceForge project holds the resulting and required binaries.