When I first began keeping fish, there weren't many resources available for cichlids keepers beyond monographs. Now with the Internet, a whole new world of information has been introduced to all fish keepers. Hardly a day goes by that I don't visit a website looking for some general information about a cichlid species I'm interested in buying or one that I already have.
While I consider the African Cichlid Hub to be a great resource, it's not just busting at the seams with information. However, I think it does have some very good and very thorough articles on subjects that any fishkeeper should understand. Because I keep dwarf Africans, I have found the dwarf cichlid species list quite informative.
The Cichlid Room Companion
Tropical Fish Hobbyist
American Cichlid Assoc.
African Cichlid Hub