Anyone know this rounded font or something very similar?

Frankfurter Medium  Vorgeschlagen von rocamaco 

Hi GravitySam - Dan from MindMeister here. Rocamaco is correct, Frankfurter Medium is the official MindMeister font. More specifically, we use the Frankfurter Medium LET Plain variation.

Wow, I didn't expect to get a response from a person from MindMeister, thanks!