Discord servers

Mega Man Leaderboards

Classic Mega (Speedruns)
Mega Man X Community
Mega Man Zero
Mega Man ZX Dream Team

Wikis

http://megamanrta.wikia.org - Mega Man 1-10, Rockman & Forte and X1-6
http://mega-man-battle-network-rta.wikia.com - All Battle Network and Star Force games

Other

https://goo.gl/7V5ER9 - Classic Mega Man RTA compendium