I am pretty sure i posted the following plugin before but as there is a new similar plugin from the same dev i thought - why not to make the package complete:

Bass Chorus



- It's not just a chorus - it's a true thru-zero flanger

- It's not just for bass - it's flexible and full-featured

- A huge, wide bass sound without sacrificing punch and focus

Have you ever used a stereo chorus on a bass sound and ended up with a muddy bottom end swimming all over the place?

Bass Chorus can avoid that problem by separating the bass and treble frequencies, where you set the cutoff frequency. The effect is only applied to the treble portion, which is then mixed back with the bass for output.

http://www.cloneensemble.com/

User notes:

http://www.cloneensemble.com/bc_user.htm

Download

Download the DirectX version of Bass Chorus now (841k):

http://www.cloneensemble.com/BassChorusX23.zip

Download the VST (Windows) version of Bass Chorus now (543k):

http://www.cloneensemble.com/BassChorusV23.zip

(Cubase users: use this Mono->Stereo version if you want it to appear in the send effects list for mono tracks.):

http://www.cloneensemble.com/BassChorusV23_MS.zip

They're completely free.