What objects in V8 I can use in my node.js http app?

I was looking around for an inherit way to parse/stringify json in node.js and found that I can use the global V8 exposed object "JSON (so JSON.parse() and JSON.stringify()". Now, I am wondering what other V8 exposed object I can use in my node.js application. I searched the web and one instance was referring to the V8 specification. However, I am not at a level that I can read and decipher what can be reused from the V8 spec in a node.js app. Can anyone with a deeper knowledge on V8/node.js help me? Thanks!