Dubstepforum.com

I use voxengo tubeamp a lot - easy to use, not a lot of options but gets the job done.

also P8

yeah voxengo
melda
variety of sound
jeroen breebaarts pack
tonebooster
gtg snyths
tal
aalto synth was free for some time too

Jeroen Breebaarts is a don! I bought a synthesizer off him almost 10 years ago, still has al his homemade sounds in it (most of them way better than the factory presets )