RethinkDB gets my vote. Their openness about compensation is more counter-cultural than all the office nerf wars you can imagine. http://rethinkdb.com/jobs/
To be fair, we were far from the first to implement this concept, just search google for "open salaries".
BTW, a perfectly open salary system sounds really good in theory, but turns out to be very difficult to implement in practice. Different people really have different needs, and it's very hard to define open salaries without having a ridiculously complex system. For example, some people have a family to support, others don't; some need financial help relocating, others don't, yet others are local; sometimes people have domain knowledge you just can't pass on, and you have to pay them outside the range to convince them to join. Equity makes things even more complex, and different people are interested equity/salary ratio.
We're pretty committed to the open system, but you can see how it can get really complex really fast, and is very difficult to implement. It works well for us so far, but I wonder how well it will scale as we grow.
I also liked how they implicitly bashed 80% of the guys who presented by pointing out that they're doing "real" technology work, not just throwing a Rails app together.
Actually, we didn't mean disrespect to any of the other presenters (we're friends with many of them), or other startups. All of these guys are doing challenging work that requires superhuman efforts. We just pointed out that most startups are applying existing technology to business problems in new ways, while we're inventing new technology (which means that in our case there's not only business risk, but technology risk as well).
We thought that the kind of people that would be interested in working on what we're doing probably wouldn't want to work on typical web startup problems, so we wanted to make that distinction with the first point.
