BioVine
This is to put around the top of the frogs enclosure. It attatches usually by suction cups, which need to be replaced often. My frogs usually like to chill out on it or swing from it during the nighttime. It's also very fun to watch them dive at food from it.
Hammocks
There are hammock-type things that are used for small lizards. These attatch by suction cups. Frogs will usually sleep in them during the day.
Caves/Other Hide Spots
Frogs will sleep in a den during the day if one is provided. One of my White's, Andy, has staked his claim on a little cave with a window in it!