I wanna try the Spro Bronze Eye frog... but it's pretty expensive.
I know you can buy a box of 6 of them from Bass Pro Shops for like 25$. I had a friend that bought one... and it didn't swim very well. He may have not been fishing it correctly, but we weren't that impressed for an 8$ lure.
I've fished the Spro frog, the Bass Pro knock-off (Kermy), and the Tru-Tungsten Mad Maxx (last year's model). I fished the TT one quite a bit last year, and got plenty of hits. But I had the damndest time getting the hooks into anything. The body was pretty firm and I suspect that had something to do with it. As a result, I pretty much only fished the Spro one this year, and have been hooking up regularly (as regular as frog fishing gets, mind you.) It comes through the pads and slop nicely, doesn't hang up very much, and seems to collapse nicely when a fish grabs it.
I bought one of the Kermy ones to try it out. It looked a lot like the Spro one, but cost 3 bucks less so I thought it was worth checking out. Sadly, it didn't work out all that well. The hooks, while nice and sharp, were angled in a way that kept snagging on the pads. The frog also didn't consistently land belly down, contributing further to the snags. Fishing it was very frustrating, and I ended up tying a Spro one on instead after about 30 minutes.
The Tru-Tungsten frogs look very good, and supposedly there's a new model out with a softer body. I haven't spent the money to check it out, so I can't say for sure if it helps. I probably will next year, since the TT frog comes with rattles out of the box while I have to cram my own rattles into the Spro ones.