EZ-SOUND has released a freeware version of its Arp-Edge arpeggiator VST for Windows which features multi-sampled synths: SID, Nord lead, Sequential six tracks, Voyager, MC505, CZ etc
Arp-Edge is also available as a SOUNDFONT.
Pricing and Availability:
More From: EZ-SOUND
And how the Ladder filter sound was made in error...