Pixelmator, one of the best image editing apps for the Mac, is on sale for 50% off the regular price of $29.99!
From their web site:
Pixelmator takes full advantage of the latest Mac technologies, giving you speedy, powerful tools that let you touch up and enhance images, draw or paint, apply dazzling effects, or create advanced compositions amazingly simple. Once your images are ready, access them anywhere with iCloud, send them to iPhoto or Aperture, email, print, share, or save them to popular image formats–all right from Pixelmator.
And, the new Pixelmator 3.2 comes with full OS X Mavericks support, non-destructive Layer Styles, a complete set of Liquify Tools, 16-bits per channel support, and the new state-of-the-art image editing engine.
GO. BUY. NOW.