The one I would recommend is Exposure, which is by the former Alien Skin
Software who changed their name last year to Exposure Software.
It is as good if not better than Photoshop, they offer a full functioning 30
day free trial and have stacks of free “how to” videos as well as having pros
contribute plugin presets.
It is based on a NON DESTRUCTIVE editing suite that also is interchangeable
with Photoshop and Lightroom.
It is also a reasonably priced program. I have been using Alien Skin Software
for around 20 years.
The also offer a package of Exposure, Blowup (for making large images from
small ones without image degredation) Snap Art for turning photos into art
pieces, and Eye Candy which is for creating photo special effects.
Antron Drew (Ret)