Manhattan Theatre Source
Not-for-profit arts organization providing resources to organize and connect the performing communities within New York's vital off-off-Broadway movement and arts organizations across the nation.
http://www.theatresource.org/

Off-Broadway Theater.com
Information on off-Broadway theater productions, news, and links.
http://www.off-broadwaytheater.com/

NYonstage.com
Offers a listing of shows and venues, including pricing and availability to become a resource for the New York performing arts audience and artists.
http://www.nyonstage.com/

TheaterScene
Source for independent professional reviews of everything from the latest Broadway musicals to off-broadway shakespearean revivals, plus cabaret, opera, and jazz reviews.
http://www.theaterscene.net/

Off Off Broadway
Information on off-off-Broadway shows.
http://www.offoffbway.com/

Off Off Broadway Review, The
Listings and reviews of off-off-Broadway shows.
http://www.oobr.com/

Theater Mania
New York City theatre tickets, news, and reviews for off Broadway and off-off Broadway theater shows.
http://www.theatermania.com/index.cfm

This Week Off Broadway
A weekly roundup of the NYC Off-Broadway theater scene from Entertainment Link.
http://www.entertainment-link.com/other-theater/off-broadway-shows.asp