A directory of anime convention related information, including guest lists, attendance figures, dates, and press releases. While the content of the convention directory is user submittable, all submissions are checked and verified against the convention's website, press releases, or other reliable source before being added to the directory. Because of this, information can occasionally be incomplete. Also hosts a video podcast about anime conventions.
Often, individuals whose work automatically qualifies as reliable (because they are published industry experts, qualify as reliable self-published sources, or for other reasons) will write pieces for more than one website, and the RS status of some of the websites they've written for will be up in the air. In these cases, as long as there's no reason to doubt the author is who they say they are, their established RS status will override the website's indeterminate RS status for that piece.
Gomanga.com - The official website for Seven Seas Entertainment an English language Manga publishing company. The website can be used to cite licensed and properties manga as well as upcoming release dates and news. As always the forum based content is unusable. Keep in mind that this is considered a Primary Source.
講談社 - See info under the "Japanese" section above.
Yenpress - Yenpress is an English language manga publisher. The website can be used for its news information and manga release dates. Keep in mind that this is considered a Primary Source.
Anime Vice - Reviews and commentaries by Gia Manry are considered reliable as she has reviews published by other reliable sources, namely Anime News Network. Other staff members (Matt Kessler, Matt Lopez, Tom Pinchuk, and Chris Schmitt) have not been vetted. Care should be taken when using Anime Vice as much of the website's content is user submitted/generated and would not be considered a reliable source. (added August 28, 2011; discussion)
Behind The Voice Actors - An online database of voice actor credits in anime, cartoons, and video games. This can be used to shortcut verify the roles as long as the credit itself has a green check-mark that leads to an on-screen capture of the closing credit that confirms the role. Screen captures here can also be used to verify "Additional voices" or "voice cast" lists, however, care must be taken in situations where the screen captures do not list the actor's particular role. Roles and lists that are not check-marked (covered by a screenshot), despite being listed under that actor, cannot be used. BTVA Award sections can be used, but only the staff's choice (not people's choice) is notable. Other site sections such as actor biographical data, trivia, voice-matching analysis, polls, credits count, forum sections are not verifiable and should not be used. (Example: 1 (can use) 2 (cannot use), Template: 1 Project discussion: 1)
Mania.com - Formerly AnimeOnDVD.com, contains anime news with thousands of anime and manga reviews. Editors must be particularly careful the reviews are from AnimeOnDVD/Mania staffers and NOT from the user-submitted "Maniacs" section. When searching for reviews, those that have a URL format of http://www.mania.com/*title*_*somenumbers*.html and that follow the original AoD review format are written by staff reviewers and are considered reliable and usable for articles. "Maniac" reviews written by users which are not RS can be detected by the lack of structured format and a URL in the form of http://www.mania.com/*username*/review/*title*_*somenumbers*.html
Nausicaa.net - The "frozen", old site is RS, but the wiki version may not be since it currently allows anyone to register and contribute (at the very least, sourcing to the wiki should probably be done as a last resort for the present time). (added May 4, 2009; project discussion, also this FLRC discussion)
^To help narrow down the number of unreliable sources from forum posts use -inurl:forums and -inurl:boards together or -show_msgs. While this will not entirely eliminate those results, it can cut them down heavily for sites like Anime News Network. If you find any sites which don't belong, feel free to contact Gwern; similarly if you find particularly bad/noisy/spammy search queries.