General Links
These pages are just pure info, and the best of their lot. No misinformation here. If you see anything that contradicts, or adds on to the information contained here, it's probably not canonical. I'm trying to avoid repetitiveness here, BTW. So unless a site has info that is not on one of these sites already, I'm unlikely to add it.
Info: Probably the best, most comprehensive info site out
there. Extremely large compendium of all sorts of information about
the various incarnations of Slayers.
Features: Contains summaries of anime, info on Japanese
publications, novel translations, information on Slayers World.
Message board useful if one has unanswerable questions
Notes: No, there will not be a fourth
season of Slayers. Don't bother the board regulars with this
question. Also, read the FAQ on the board before asking things.
Info: Probably the best site to get information about the
original Slayers novels.
Features: Contains novel summaries, spell info, Slayers Fight
(card game) info, frequently asked questions, fanart archive (very
worth visiting), links to Japanese/Korean fanart sites.
Notes: When getting into the very precise aspects of Slayers
(technical magic info), this site contains the relevant information.
Well, this is a somewhat short list. I had a third link, but it went down.