Adobe Photoshop Elements 12 ($100)
Adobe Photoshop Lightroom 5 ($149)
Apple Aperture 3.5 ($80)
Apple iPhoto 9.5 ($15)
Flying Meat Acorn 4.1 ($50)
Pixelmator 3 ($30)
Corel AfterShot Pro ($25)
CyberLink PhotoDirector 5 ($60)
GIMP 2.8 (Free)
LightZone (Free)