Download of PowerSDR-IQ 1.12.23 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular version of the program is 1.1.
The latest version of the software can be installed on PCs running Windows XP/7/8, 32-bit. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. PowerSDR-IQ relates to System Utilities. The actual developer of the free program is SV1EIA.
From the developer:
A FlexRadio PowerSDR based version with functionality suited to various SDR designs, projects and kits.
For the homebrewers simple LPT port pins are used to tune the Si570 chip as smooth VFO, drive LPF/BPF bandswitching, give PTT input and Rx Tx output control and CW keying.
USBtoSDR interface is directly supported with the included ADC/DAC and I2C connectivity.
You may want to check out more software, such as Snappy Fax 2000, Right PDF printer or SoftX Internet Logger, which might be similar to PowerSDR-IQ.