Until April 16, Topaz Labs is offering their Complete Plugin Collection at 40% off.
Here is the link:
TOPAZ COLLECTIONIf you already have some plugins, you will get a partial credit for them, thus bringing the total price down.
And if you just want to try it, you can do it for 30 days free.
Use the following discount coupon to get all 17 Topaz filters for 40% off.
SPRING40