Manual do Gimp: http://www.gestaoescolar.diaadia.pr.gov.br/modules/conteudo/conteudo.php?conteudo=167
http://www.webtutoriais.com/categorias.php?categoria=Gimp
http://www.gimp.com.br/smf/index.php?board=34.0
http://www.estudiolivre.org/gimp
http://www.dicasdodia.net/2007/04/27-tutoriais-sobre-gimp.html
http://www.noupe.com/how-tos/30-exceptional-gimp-tutorials-and-resources.html