GIMP for Windows and other operating systems can be downloaded here, a customised Windows Portable version here
Documentation:
GIMP - Online Documentation - the official GIMP documentation site Grokking the GIMP - an online book clearly explaining the use of individual tools (although outdated, still excellent)Tutorials:
GIMP - Tutorials - the official GIMP tutorials page Gimp Tutorials for photo retouching - short guides for photo retouching
GIMPtoriály: Simple tutorials for GIMP - Learn how to cast shadows, create comics, use effects, enhance or retouch photos Series: GIMP in examples - demonstration of the use of various tools and procedures through practical examples GIMPguru.org - a site full of ideas on how to edit photos 60+ Best GIMP Tutorials of 2010 - mostly topics for photo editing and creating interesting texts with various effects Best of GIMP - 40 "professional" tutorials to improve your GIMP skills GAP Beginner Tutorial - detailed instructions on how to create a simple animation of three "floating" rectangles Gimp - Introduction - introduction to GIMP, photo retouching, creating graphics for the web (a really large number of tutorials)
Gimp - Linux Superstar - a brief introduction to GIMP and a few interesting examples of use Gimp - First Steps - how to start with GIMP when creating specific images (quite outdated) grafika.sk - GIMP - a website dedicated to well-known graphic programs (only a few articles dedicated to GIMP)Miscellaneous:
GIMP Talk - Community - forum, tutorials, gallery, FAQ, news about GIMP Gimp Animation Package (GAP) - a package for creating animations with instructions and a set of interesting animation scripts GIMP Text Logo Examples - an overview of created images with text logos GIMP Filters - a simple overview of filters on images