You could house one of many things in there. I'll sort it out by terrain.
Terrestrial:
-Leopard geckos
-African Fat Tailed geckos
-Pictus geckos
-Bullfrogs
-Pacman frogs
-Leopard frogs
-Blue tailed skinks
-Crocodile Skinks
-Ocellated skinks
-Salamanders
-Newts
Aboreal:
-Crested geckos
-Day geckos
-Whites Tree frog
-Tokay geckos
-Tree frogs in general really
By heated rock I hope you mean a rock that you have under the basking light and not a heat rock as those get hot enough that the poor animals get burned and often burned ON TO the heat rock. For any herptile you will need a UVB lamp of the proper UVB rating, however nocturnal spieces can thrive just fine with out a UVB lamp so long as you provide Calcium with D3. If not you run the risk of MBD developing (metabolic bone disease).