xoxos has announced that all xoxos VST plug-ins that were previously sold are now available as freeware. Donations are still appreciated of course.
There are lots of very interesting plug-ins now available for free, including physical models, MIDI FX, algorithmic generators, voice generators and synths. All of them are available for Windows as VST instrument or effects plug-ins.
Check them out (and make a donation if you can).