37signals is a web products company, most famous for Basecamp. Ruby on Rails came out of there.

I don't know if their generosity to their employees translates to their bottom line. I think it works the other way: they are profitable enough that they can afford to be generous to their employees. The 37signals model seems to be: 1) have amazing people working for you 2) treat them really well. It's highly effective, but you need to have cash in the bank to get to step 1.