A must see. Tons of images, tutorials and Include-menu add-ons.
Rune has created all sorts of computer-graphics. Both 3D and 2D. His Blob tutorial is excellent and he has written many macros that people use in their PovRay scenes.
Create caves in Povray using height-fields. This is a nifty technique which I have used in my own scenes.
One of the best image editors out there! I use it almost as much as Pov.
This is one of my favorites. I use it mostly for creating meshes and exporting them but you can generate entire scenes with this beast. AOI also reads .OBJ files.
A surface subdivision modeller. I haven't used Wings yet but it is very popular among Povray users
Create realistic looking trees and export them to Povray meshes.