Badges, Leaderboards and Gamification?

Content

Has anyone used any other vendors other than Badgeville to build badges and Leaderboards?

I'm thinking we can show/hide badges to users by using dynamic groups and access filters, but i'm not sure where to start with leaderboards. Is this something an internal IT team can build with the current APIs? 

I've seen a lot of chatter about Badgeville but I can't seem to find them anymore. Did they get acquired? Do they still do this?

Any info appreciated!