Rsgb
SDV v.14.31
SDV is a new and usefull software that you can get it for free on your computers. SDV has been updated to support the new rules for RSGB VHF contests with square multipliers - they count only for QSOs.
Fldigi v.3.20.29
Fldigi is a simple to use digital modem software that can be used by radio amateurs. Digital modem software for Linux, Free-BSD, OS X, Windows XP, W2K, and Vista.