AtomicParsley is a command line program for reading, parsing and setting iTunes-style metadata in m4a files (really any mpeg4 file container: m4b, m4p, m4v, mp4).
Cygwin is a Linux-like environment for Windows - for sel ;-)
Chickenfoot for Firefox: Rewrite the Web
a simple editor for cutting out scenes (read: ads) of mpg, e.g. vdr without re-encoding
open source clone of del.icio.us