Black Cat Systems ( announces that RF
Toolbox version 3.6.0 has been released The latest version adds an RF
Link Budget Calculator, for determining the necessary transmitter
power, antenna gains, and other parameters for various radio links,
including WiFi.

RF Toolbox is an antenna design package for amateur (ham) radio
operators, and other radio enthusiasts, as well as those in the
communications professions. It’s available for Mac OS X and Windows.
RF Toolbox costs US$19.99; a demo is available for download.