I've been using Cabos for a while and am very happy with it. One thing I'm not sure of is whether it is equivalent to plain old Limewire or Limewire Pro in terms of how much it can find. I was using Limewire and even paid to use Limewire Pro for a while, but I found Cabos a bit more responsive and streamlined, and less prone to crashing. But I haven't tried Limewire for a while, so maybe it's improved now. Cabos remains in active development, with regular updates.