MP3OCD is an MP3 categorization program written in pure Python. It differs from traditional MP3 categorization because it queries freedb.org to obtain information about a set of MP3s and automatically renames them to their appropriate names. It also sets up a set of symlinks to make burning easy.
PHP Video Toolbox is a PHP class that wraps around the FFmpeg, FLVTools2, and Mencoder programs to allow PHP developers to manipulate and convert video files in an easy-to-use object-oriented way. It also currently provides FFmpeg-PHP emulation in pure PHP, so you wouldn't need to compile and install the module. It isn't intended as a FFmpeg-PHP replacement, only an alternative solution. It is recommended that if you make heavy use of the FFmpeg-PHP functionality you should install the module, as it is more efficient.