Stolen Bike's Thermalite platform pedals. Excellent values at $15-$25, depending on whether you get the version with molded in nibs or replaceable pins. I got a set of the molded in nib pedals last fall, ridden 'em over 1,500 miles. No problems, would buy another set.
They grip my casual shoes well without damaging the soles. Nothing sharp or pokey to cause discomfort through my thin soled deck shoes. No slipping when wet or muddy. Barking my shins against the pedals doesn't hurt any worse than my softer nylon platform and Sakae No Fat pedals.
The hard nylon material is tough. It's abraded a bit along the edges from scraping on tight turns and against rocks. I like the pedals to give a bit rather than launch me like a pogo stick, or transmit shock directly to the axles. The Thermalites do that.
And the Thermalites with molded in nibs come in about half a dozen colors. I got blue to go with my Univega's blue over black splatter paint. The aluminum Throttle pedals have a selection of colors too, but I haven't tried that version.