AFAIK...SQLmap is pretty old, right? I definitely have vaguely heard of it before...however, I was surprised to see it have not just a spiffy Github Pages homepage (after being on SourceForge), but a pretty highly followed Github account with commits in just the past couple of days.

But honestly, I have never heard another developer talk about using it (though I imagine full time sysops and security folks know it well)...even though it seems like it has an API easy enough to use and throw in as part of your dev toolkit (e.g. run it as part of an integrated test quite).