The Filterscape bundle consist of the Filterscape multi-mode filter, Filterscape Q6 a 6-band equalizer with dynamic capabilities, and Filterscape VA a virtual analog synthesizer based on Filterscape's modular architecture.
To celebrate the beta release they've launched the "Welcome 2 Windows Weeks" pre-release offer, which gives you the chance to purchase Filterscape for the special price of US$89 (instead of US$129) until April 15th.
The final release is scheduled for late April.
Find Filterscape 1.5 in the KVR Marketplace