We're an all-Mac shop, and HexFiend is the best hex editor on the platform (0xED is more featureful, though... but "lots of features" isn't what I want out of a hex editor).
Interesting. Is there any particular reason why you went all mac? We run a mix of everything for infrastructure, but it's pretty much 7 on the laptops, VMs for testing from.
I also want to know what the two other apps are :)