The current release version is Radian 0.1.0.

  • Radian 0.1.0 (binary for Mac OS X 10.6 or later) 31 January 2012
  • Radian 0.0.0 (binary for Mac OS X 10.6 or later) 30 December 2011

You can also set up a development environment and compile your own binary from source.