free sdr

MultiDem - USB LSB AM Modem (Modulator/Demodulator) for SdR and DSB (direct conversion) transceivers by F6CTE

MacSDR - Freeware SDR for Mac by DO8SEM Sebastian now named SDR Radio by DL2SDR

Commander  ^{updated  pop} - A free application that controls up to 4 Alinco, Elecraft, FlexRadio, Icom, JST, Kachina, Kenwood, TenTec, or Yaesu transceivers, switching between them manually or automatically based on frequency, and displaying frequency-dependent settings for devices like tuners and amplifiers; includes a bandspread, and supports transverters, frequency and mode tracking by an independent transceiver or receiver, SDR-based panadaptors, and SO2R switching with microHam or OTRSP-compliant devices.

CCRadioTech Uniden programming software - Free windows control/programming software for the Uniden Bearcat UBC-3300XLT and 780XLT

Rocky Software for SoftRock40 - SDR software for SoftRock40 freeware by Alex VE3NEA

WINRAD by I2PHD  ^{updated  pop} - Winrad is a free software program designed to implement a Software Defined Radio (SDR), meant to run under Windows XP, Windows 2000, or Windows 98SE. In a nutshell, it accepts a chunk of up to 96 kHz coming from a complex mixer in form of two signals, I and Q, fed to the PC sound card.

WinradHD - WinradHD is a Software Defined Radio (SDR) freeware application by DG0JBJ for Microsoft Windows 2000/XP/Vista/7 and based on the open source code of Winrad, written by I2PHD.

Argo - Argo is a freeware windows viewer for MTHELL, Slow CW, like QRSS and DFCW. Can be used for EME operations by I2PHD and IK2CZL

SDR - Software Defined Radio Projects - An updated and classified collection of SDR projects and realizations