A guide to The Real Ghostbusters by Rich "Spengs" Roy of GBI. The highlight of the site is a section of scans of the the old RGB magazine, featuring comic stories by some of the same writers and artists who worked for NOW Comics.
Ghostbusters Apocalypse is a webcomic by Richard Crypt. It's the future and it sucks. But when the ghosts and monsters roaming the land get out of control, you know who you're still gonna call.
The Ghostbusters International Web Site. Administrated by Rich C. Roy (Spengs), it's the indispensible source of information about upcoming projects from GBWC and all of the GBI franchises!
The Ghostbusters Podcast
Ron Daniels (Jesusfreak) and Jason Hughes (Captain N of http://www.gbgrid.com ) have started a new Ghostbusters podcast. It's pretty cool, and you can check it out.
Ghostbusters Toy Archive is run by Luke Venkman, and is a good source of information on all those wonderful toys, even the Filmation ones.
Nightsquad.net is the official web site of the Ghostbusters: Nightsquad, the first and formost of the GBI fan fiction franchises. Just don't go on their message board if you offend easily
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NYGB COMICGUIDE (Archive) Founded by ECTO-1, and restored by Paul Rudoff and myself, is a treasure trove of information about the NOW Comics run, and lesser known oddities like the Filmation Ghost Busters comic, and the quirky RGB comics produced by Marvel UK.
The Real Ghostbusters Fan Page! Webmastered by Shiela Paulson, possibly the most prolific creator of Ghostbuster fan fiction. Many of the "facts" about the Ghostbusters families found in the Timelines and Fact Lists come from her fan fictions.
Real Ghostbusters: Out Of Control. Fan site established by Tory Brown back in the late 1990's, filled with some humorous "interviews'" with the Ghostbusters, some fan fics, and reference works. Matthew Riddle found the list of Ghostbusters birth dates there (though the only one we used as is was Ray's).
Spook Central, created by Paul Rudoff, recently reopened for visitors . This is one of the best GB sites I've ever seen, with episode guides, the movie scripts, and loads of pictures.