Continuing their NFG (Nearly Forgotten Gems) series, HG Fortune has released the STS-33 Pro as freeware.
In a special offer no-brainer deal they are also offering their Serenity Pro - the heavenly strings and choir synth for $5 only.
Pricing and Availability:
STS-33 Pro: Free download
Serenity Pro: $5 from Oct. 25th to Nov. 10th 2013
A Sexy sounding filter, great modulation source, oscillator and slew limiter