VARA HFHigh Frequency (3-30 MHz) is a soundcard modem like ARDOP that can be commonly found on the HFHigh Frequency (3-30 MHz) bands exchanging traffic (Winlink). The creator of VARA is EA5HVK.
Free version of VARA HFHigh Frequency (3-30 MHz) only allows tranfers up to ~180 bpsBits per second (bps), where as the paid version (70 USD) can allow transfers up to a max theoretical speed of ~8490 bpsBits per second (bps).
VARA is commonly found on the amateur bands & occasionally CFARS/MARS frequency assignments.
Creators website can be found at: https://rosmodem.wordpress.com/