I've made the Mercurial source code repositories for my old SCUMM tools public, they've been published on BitBucket. I've also added links to the repositories on each app's info page. Hopefully, this will make it easier for people to fork their own versions of the code and make changes.
SCUMM Image Encoderhttp://bitbucket.org/jestar_jokin/scumm-image-encoder Note that the SCUMM Image Encoder repository was merged from an old Subversion repo and a newer Mercurial repo, hopefully the merge didn't introduce any regressions.
DRO Trimmer and RobinPacker already have public source code repositories available, now they have a proper link on each app's info page.