ModMod is a free software synthesizer developed by whitebox. Available format(s): Stand Alone, VST for Windows.
A very simple Frequency Modulation synth based on a carrier oscillator with two modulators, hence “ModMod”. An added attraction is the inclusion of a rich and lovely stereo reverb by David Haupt & Unkargherth.
The 8 re-writeable presets are inspired by distorted guitar and piano sounds. Think Fripp then think Eno.
http://whiteboxsynthmakers.com/