You can use a cent. clutch, they are cheap and will work once you learn the CC deep water start technique. However, I'm much happier with a Tav2 Torque-a-verter (thats the most common one) though. Ive rode both and prefer the tav2 way over the CC.
The Hive Winch has an even better setup than a Tav2 based winch, so far they are the only ones who are using it. I've rode behind it, and yes, its awesome
Kento's pirate winch is another design that took a different approach than the rest of the winches out there. Most winches are "go cart" based, his is dirt bike based. I've never rode it so i cant comment on how it rides.