The Salty Dog Kent tugs are Gusto's favorite. Excellent grip, bungie action for tugging, and a nice solid ball to use for whacking himself in the head or me in the leg. I have three of them floating around here, and feel like I should order more to have as backups.
We have a cotton/nylon tug, and it is made by Julius K9. It is so strong and so fun to play with. I have had issues before getting the right kind, and I finally did. They also make tugs out of leather, but I personally don't have experience with those. http://k9-usa.com/Tugs-cotton/nylon
This Kong Tugger Knots Moose is BY FAR Leo's favorite tug toy. I think he really likes the feel of the fur over rope in his mouth while tugging, but the rope underneath gives the toy a lot of resilience. It has held up to him really really well. Super durable. We've had it for a long time now, and it is still in perfect condition.
My general use tugs are milking inflations because I get them for free by the box load from my brother in law who works in the dairy industry. They don't last long, maybe a couple of sessions. They can also be slippery.
I occasionally win polar fleece tugs at rally or agility and they last all of 5 minutes against Kep. I try and save some for Gael as she loves tug but in a less destructive way. She has a nice fat fleece tug which is also a lead that we use at agility shows.
Kep has a Puller which works really well for him as he flies in super fast and grabs his tug and I can keep him on the other side from my hands. He can also prance about with it over his head before coming back and doing a head flick for me to grab the other side again. I'm pretty sure he would destroy it given half a chance but as an interactive toy it has lasted well for a few months so far.
And I love LOVE my Tuffie shark. It's long enough that he can grab it in the middle and I can grab each end, and it's held up well. I have two, Maisy managed to destuff one but it is still great for tugging. http://www.tuffietoys.com/page/398229288
We have several rope tugs of different sizes. They are all old and wouldn't know the names/brands of them. I need to get a new bigger one for Nola, all the big ones were destroyed by Gunnar and Daisy over the years.
Our favourites are from Salty Dog Canvas and Z-Control.
Salty Dog just makes some really good quality, durable options. I like the tugs with sheep shearling. I also used to get toys all the time from them because I lived about a half hour down the road from them and didn't have to pay for shipping.
Z-Control has some really awesome real fur options. I bought a raccoon fur water bottle tug for Kili for demos. She normally isn't allowed toys with real fur, but I wanted something extra special and doggy crack like for the high arousal atmosphere of demos. We'll see how well it works at our first show, but the one or two times I showed it to her at home she went absolutely bonkers.
Recon's tug toy has been around for about 2 and a half years now and it's still going strong. Patton's only had his bite discs since June, but they have proven to be the toughest discs we've ever used. They are my go to for roller/tug training because no dog is going to put a hole in them, I have decided! lol