(click here for download info) 
8 free plugins. Not just one; 8!
Blue Cat Audio has a bundle of free plugins available for download that include:
- Chorus
- Flanger
- FreqAnalyst
- Gain suite
- Phaser
- Stereo Chorus
- Stereo Flanger
- Triple EQ
Whether or not they will be useful to you is really up to you, but at the price (FREE!) they are definitely worth a try.