I agree with the above poster
I'm currently using

Pothos,
Dracaena
Dieffenbachia (Be careful with this if you have cats/dogs/other pets that may swallow this, It's cells irritate the throat and cause it to close (kind of like anaphylaxis) Frogs usually dont eat it, so it's pretty safe for them.
Ficus Pumilia (Creeping Fig)
Snake plants are great, especially for heavier frogs
Also some random Bromeliad that I got from walmart


Plants I'm not using but will in the future:
Ananas lucidus, available from Black jungle
Any "earthstar" bromelaid...earthstar being a common name.
Calathea pretty common large leafed plant

Those are just some of the many plants available. Like Brian said, look around and then make sure it's safe for frogs. Have fun, and good luck!