Is there any link software (not xbox live)

that you can install directly onto the xbox to play games via the internet?

or do all other apps currently out have to go via the pc?

You can't do this cause the XBox can only run one thing at a time. So all tunneling software must require a medium of some sort. Mostly just a PC but if you don't like getting up you can use XBC's xTc or Xlink's XBMC to connect to your PC and browse and join servers.

P.S. You doubled posted silly.