Free to download: the TRK-01 PLAY plugins from Native Instruments are dedicated kick and bass instruments, with a ton of synth-based modulation options.
The new plugins are actually drawn from the kick and bass engines from the TRK-01 bass synth.
The KICK half of the bundle is a blendable dual-layer kick drum engine that takes its sounds from synth-based sampled kicks, with modulation options.
Its BASS sibling relies on five synth engines, giving you a huge array of tonally creative options.
Head over to the Native Instruments website to get involved.