Nashbar Downtown Platforms
https://www.bikenashbar.com/cycling/...-pedals-nb-dpp
(Don't have a close up pic handy of them on the bike. These cropped out of larger pics is what I've got)
They are lsited at $18 on Nashbar today and that's the most expensive I've ever seen them. They are usually on sale (I know...a sale on Nashbar...what are the odds?
) for around $12.
They spin freely. Maybe not as well as a $75 pedal, but pretty darn good. And for under $20.
The surface is curved so it holds your foot well. And the grippy stuff isn't like a cheap sandpaper sticker that will wear off. It's deep embedded hard plastic stuff that's very grippy.
The surface is very large so it's easy to keep your foot on it.
I've had these for about 9 months and I've been very happy with them. They grip really well when wet. The only time they lose grip is when they are caked in mud. You'll need a pedal with pins for that. But those will tear up the soles of your shoes and hurt like the dickens when you smash your shins into them. So there are tradeoffs.