Wondering if anyone knows of any opensource rar library for actionscript, similar to fzip, which works for zip?
I didn't see any on a quick Google search, so my guess is no. However, I did find a few open source Java implementations, such as the library used by Catacombae. You could then try and use something like j2as3 to convert it to Actionscript. You would just need to re-implement anything that uses generics or Enums to a native AS alternative.