need help with android apps

I recently made the move from the iphone to the galaxy nexus and where Ive been an iphone user for the past 5 years Im not real familiar with all the great android apps. It really seems limiting as far as whats available and is quality. Or maybe I'm just not good at finding them. Anyhow, Ive managed to get most of the "essential" apps or so I believe but is there any that you guys can throw at me? I really miss some of the great apps on the iphone