Image Editors
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Free Tools 

Good source could be the full software included in magazines.
There are only few magazines carrying full software (not just demo or shareware) and surprisingly all of them are from Future Publishing from London. The names are : PC Format, PC Plus, PC Answers, PC Review.. usually carrying 2 CD's in each issue. You could get for free full (older) versions of: Simply 3D, Satori Paint, Corel Draw + PhotoPaint, Image Pals, MGI, Bryce 3D .... usually 1-2 years old versions, but still - for the price of magazine.

Buttonz & Tilez from B-Zone
The package includes 2 applications, "Buttonz!", which creates buttons of various shapes, and "Tilez!", which renders seamless textures.