Simple Mobile apps have been very popular among FOSS enthusiasts. I've personally been using the Gallery, Contacts and the Phone app since a few years now. It's a shame that it has come to this, will be on the lookout for their forks.
For posterity, but also for forks if the repos go down, I have created https://github.com/SimplerMobileTools and downloaded all the original repos, branches, and tags which will soon be uploaded there.
I have already got SM Gallery compiling, so thats a start, and will upload all the repos tomorrow when its not so late.
Note: Any former maintainer of SMT will be added on to SrMT upon request.
EDIT: All forks updated with notice of rationale and link to this discussion.
EDIT2: https://github.com/FossifyOrg is a soft fork created by one of the current maintainers. I will keep the hard fork up just in case.