The best replacement for adobe photoshop is elements.

The best alternatives to adobe photoshop are rated as following:
★★★★★  elements
★★★★★  lightroom
★★★★★  gimp
★★★★★  illustrator
★★★  paint.net
★★★  aperture
★★★  krita
★★  corel
★★  photoshop elements
★★  paint shop pro
★  adobe illustrator
★  corel draw
★  iphoto
★  adobe photoshop elements
★  corel paint shop
★  fireworks
★  indesign
  picasa
  aperture 3
  paintshop pro
  corel photo paint
  photoshop extended
  macromedia fireworks
  coreldraw
  apple aperture
  imageready
  corel paint shop pro
  roxio creator
  corel painter
  ulead photoimpact
  adobe lightroom
  jasc paint shop pro

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Speaking about adobe photoshop, one probably shouldn't forget about animation.

Other search terms related to adobe photoshop and their ratings are:
★★★★★ animation
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Google Trends

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