[leviathan]

I've had this idea for quite a while for git visualisation tool where you open a project and can open a file and scrub through the timeline and see the changes live.

The fact that this idea is better suited inside an actual code editor (and not just a standalone app) and me not being brave enough to tackle writing a code editor is what is stopping me from doing it.

[lloeki]

I'm using this with fugitive.vim all the time:

    :Glog     # this can take arguments to reduce scope
    :cnext    # repeat!
    :cprev    # step back!

bonus: unimpaired.vim binds those quickfix navigation commands to [q and ]q.

[steelcm]

If I remember correctly, Perforce SCM had this feature.