Unlimited time off (vacation, sick days, etc.), monthly company events, open office with plenty of things to do during and after work, insurance, stock options, weekly fresh direct orders, holidays off, and much more.
Fully stocked kitchen every day!
Unlimited vacation is a mixed blessing. You truly can take whatever time off you'd like (within reason) and will not be denied. However there is an unspoken understanding that you should be available while on vacation and if you take time off frequently you should be getting some work done when gone.
List based on reports from current and former employees. It may not be complete.