SubBoomBass RE, a dedicated bass synth with presets designed by Rob Papen and other guest artists, will supply you with "huge cone-rattling sounds that will body any music track".
This software instrument is great for Hip Hop and RnB but can also be used for Dubstep, video game music, film scores, etc.
Pricing & Availability
SubBoomBass RE is available for the introductory price of €49 / $59 until 31 December, 2012 (then €65 / $79).
More information at propellerheads.se/subboombass