GIMP (JIMP) Icon tutorial
Dang I hate icon tutorials that make sphere icons with a speaker with a slightly annoying high pitched voice with crappy microphone quality on Gimp while pronouncing gimp jimp. I hate those tutorials. Luckily, mine isn't one of them. 0_0 or maybe it is. I respectfully revise my opinion.

Gimp tutorial : icy or ice effects
a tutorial on how to make icy effects for pictures.

Smooth skin with healing brush in GIMP 2.4
A short lesson about photo manipulation: smooth skin with GIMP 2.4.