We have tried bully sticks, cow ears, Salmon Paws Omega Stix (great to cut up as training treats!), Himalayan dog chews (which last about as long as a bully stick), Antlerz (seen above, last longer than bully sticks), fish stix (outlasted both bully stick and antler!), ostrich tendons, Nature Nosh treats (great ingredients, natural repellents), and beef tracheas (gone in 10mins tops). They also carry some great products like Dr. Harvey's (though not power patties, yet!), Oma's Pride and Zukes.
So go on, check them out (follow their blog) - Best Bully Sticks is Inu approved!
(They also have a referral insentive, say email@example.com sent you!)