It's been on my mind that Azul, in Brazil is a rip off airline off jetBlue.

1. The name, Azul means "Blue" in Spanish and Portuguese so there's one similarity.
2. Azul flies lots of E-190 series like jetBlue.
3. Azul's seating concept is similar to jetBlue's, both have regular Economy and extra legroom seats with a special brand name.
3. Both airlines have a similar inflight serice concept, complimentary soft drinks and light snacks.

Let me know if you've ever thought of this or found more similarities?