Armored Core Xtreme: This site provides a good bulk of up-to-date parts info and pictures. It also has an active forum and a very useful AC builder.
Team Avalon: Deemer and Setsuna's AC site for Team Avalon. Includes design submissions among other things.
Armored Core Online: One of the great newer sites containing all types of pics and just about anything an Armored Core fan could need.
