progettosnaps.net — Best place to get all the addons for MAME. Tons of pics and manual available.

emulab.it — dats download portal, great place to get the MAME dats.

emu-france.com — News-portal with links and downloads to different emulators.

mamedev.emulab.it — One of the best rommanager available on the world

mameworld.info — MAMEWorld - The largest MAME resource on the net! - Find EVERYTHING you need for your retro gaming experience!

mameguide.info — A very useful tool for creating MAME dat files. Full, rollback or update dats are very easy to generate. Use the created dats with a rommanager.

mameguide.info — MAME - the guide, Beginnersguide for MAME, compiling-scripts for MAME/MESS/MAMEui/MESSui/HBMAME