I'm a pretty big fan of TinyPNG. I was actually part of their beta invite for the API and wrote up a quick Ruby gem(1) to automate the process (and to auto-shr

I'm a pretty big fan of TinyPNG. I was actually part of their beta invite for the API and wrote up a quick Ruby gem(1) to automate the process (and to auto-shrink PNGs on a Capistrano deploy). I haven't really messed around with it much since then, but it was fun to write and the team at TinyPNG was very accommodating. Not sure what I think about their pricing structure, but I wish them the best. 1) https://rubygems.org/gems/tiny_png https://rubygems.org/gems/tiny_png