If you happen to be especially save conscience: Torvak's Dominions 2 savegame utility

For prettiness: Ben Sones Skin's (found at Illwinter)

For newer maps: Kingdom of Karan by Targa and a few others are very decent.



Links: www.illwinter.com/dom2/maps.html - Illwinter Map DL's
www.illwinter.com/dom2/mods.html - Illwinter Mods DL's
http://www.dominions-2.org/files.htm - Arryn's Site