If you have never tried it or heard of it, download Topaz Labs, they have a 30 day free trial after that you have to buy it or lose it, i have used it for 3 years now and would not go past it, they do all different programmes you decide what you want to try out.
Great web site and you get free updates for ever more, i think i paid about £24 at the time, it is used in conjunction with Photoshop.
Give it a try
Yep, they're excellent.... I only have the 'Adjust 3' but I'd love to get the whole 'suite'. They've also had an effect on the whole 'plug-in' industry..... some of the older players, like Lucis Arts, have had to try harder with their pricing. That can 'hurt' the people who work for the companies that develop those high-priced items but then it could spur them on to new ideas.
I have Topaz Adjust 4 they send you automatic updates to download, i must agree all the stuff they have is good, well worth a few £s, contact Eric at Topaz and see if you can get the ew Adjust 4 Update.