Modify Mercurial's MQ extension by altering several commands and adding a few more. Main feature is version-controlling your patch queue automatically with every operation that changes it.
Mozilla trychooser extension for selecting builds, curses version
Queue up a backout of a series of changesets, ported from https://wiki.mozilla.org/User:Mak77
Modifications to bzexport. See http://hg.mozilla.org/users/tmielczarek_mozilla... for the canonical source.
Modifications to Jim Blandy's archer-mozilla repo (see http://itcouldbesomuchbetter.wordpress.com/2010...) at http://hg.mozilla.org/users/jblandy_mozilla.com...
Minor additions intended mainly to submit pull requests. Currently just qcrefresh.
Steve Fink changes intended for merge back to Ehsan's repo.