Fractal Forums is a message board which features thought-provoking discussions about technical and artistic aspects of fractals. The site is populated by a productive mix of artists, software developers, and mathematicians. It includes high quality image galleries and videos, as well as the latest free software downloads.
Algorithmic Worlds, authored by Samuel Monnier, is an insightful and technically sophisticated blog dealing with fractal art and related disciplines. Posts cover an eclectic mix of topics, including Monnier's own art, the works of other artists, and natural fractal imagery. New blog entries appear sporadically, but the older ones are well worth reading.
The Fractal Foundation is an educational organization based in Albuquerque, New Mexico. Its website is an excellent source of understandable explanations, as well as news items, images, videos, and software.
GIMP, the GNU Image Manipulation Program, is an open source image composition and editing program; it is somewhat of a poor man's alternative to Photoshop. GIMP has only a primitive capability to generate fractals, but it is very well suited to processing them.
Seadragon Ajax, created by the now-defunct Microsoft Live Labs, is the zooming interface employed on this site. It is free of charge, easily configurable, and appropriate for high resolution photos as well as digital art.
Creative Commons is a nonprofit organization which provides a variety of licenses for use by content creators. These "some rights reserved" licenses are much more flexible than the "all rights reserved" approach of traditional copyright. Creative Commons licensing can serve as a simple mechanism for artists to build upon each others' works.