- Wikipedia, the free encyclopedia: Babylon 5
has a lot of information about the series and J. Michael Straczynski, its creator, as well as individual character profiles, among others ones for Jeffrey Sinclair and Michael Garibaldi.
- Warner Bros.: Babylon 5
This is the series' official site with - compared to the show's heyday - very limited content.
- crack_van: Babylon 5, the last, best hope for... just about everything
Sabine invested a lot of effort into her essay and made the show, the story arc and its characters accessible and comprehensible.
- Voltayre's Encyclopedia Xenobiologicatm
is an invaluable resource for all and any researches centered on the B5 universe.
- Babylon 5 ISN News: The Zocalo Today
A fan run web site network which provides all the latest news and information about Babylon 5 and Crusade.
- The Babylon 5 Tech-Manual
The oldest and most detailed site concerning the technology, ships and weapons of Babylon 5.
- BabTech on the Net
maintained by Brian Young strives to present the most accurate available study of the fictional technology seen in Babylon 5.
- ThirdsphereNet -- And The Sky Full of Stars...: Alien Languages Index
A compilation of words and phrases in various alien languages from the show, books, comics, and other miscellaneous sources.
- 190 Bester Place - A Tribute to Babylon 5 and Crusade
contains a lot of information about B5 among which especially the extensive and informative character CVs are notable.
- Science Fiction Timeline Site: Babylon 5 History Page
A timeline, a compendium of visions, dreams and prophecies, astronomy in the Babylon 5 galaxy and a list of all human colonies.
- B5 Spoiler Junkies Archive
contains an episode guide, a ton of pictures, and detailed synopses of all episodes/movies.
- JMSNews - The J. Michael Straczynski Message Archive
is a free service that provides an archive of messages posted by J.Michael Straczynski (JMS), the series creator, to Usenet, CompuServe, AOL, and Genie from 1991 to present.
- [sinclair] Mailing List @ Yahoo! groups
We used to have a round-robin going, but the list is pretty much dead nowadays.
- universe_today @ livejournal
This lj community collects links from lj and elsewhere that pertain to the Babylon 5 fandom: fanfiction, meta-analysis, fan art, icon challenges, fan fiction challenges, news, and more, and posts updates every Sunday evening.