SIT: SCM-agnostic, file-based, immutable issue tracker (early preview)
github.com
github.com
I was thinking that eventually a sync tool can be developed for SIT to pull/push from GitHub/JIRA. It's probably won't be perfect, but a good stopgap measure.
Not sure if your idea is feasible for some of the bug trackers (if there's a custom issue database plugin, one can try!), but it is a great idea nevertheless.
Also, I am playing with some ideas on building a web UI to this tool (both local-running and eventually externally facing one as well)
Great work.