I used to use tuf-glide. It is okay, but the smell kills it for me. I use smooth kote on my Glocks and it works great, but how much lubricating action does a Glock really need...LOL. I haven't tried this on my knives because it dries and leaves a black film as the lubricant.
Now, I use nano oil almost exclusively. I tried Reeve's grease, but it slowed the action down too much for my liking, talking specifically about my Sebenzas. I even tried a mixture of grease and nano oil and didn't like it. It kind of bumped me out that I hunted for and spent $20 on 10 g of grease.
However, I broke my Spyderco Southard down yesterday and used a mixture of the grease and nano oil and it is amazing. It did slow the action down a tiny bit, but the bearing system makes up for it. I will be using this mixture exclusively on at least this knife.