My latest install was Qrushr Girls. I think it's more meant for women who are single, but the thing I find awesome about it is that it has a sort of gaydar built into it - it uses your current location and tells you what other lesbians you are near. I wish there were one for LGBTQ that didn't have this weird hookup/relationship energy - but just functioned more in a pride/networky way. I downloaded it to check out how the radar worked though, and there are definitely other people in my area who say, "I'm happy in a relationship - just wanted to be on the map" so it sounds like people are subverting its purpose a bit.
Damnit I want real-ass gaydar on my iphone now.