NYFA: Probably the best site for New York Artists. You will find lists of jobs, opportunities, grants and residencies, and useful articles for working artists.
BRIC Rotunda Gallery: aim to increase visibility and accessibility of contemporary art (Brooklyn).
Brooklyn Waterfront Artists Coalition: BWAC is the largest artist run, not for profit art organization in Brooklyn. The exhibition space is located at 499 Van Brunt Street, Red Hook, Brooklyn.
Chashama: studio space and exhibit/performance space
CUE Art Foundation: non profit forum for contemporary artists.
Drawing Center: focuses on the exhibition of drawings.
Eyebeam: technology center providing tools for digital research and experimentation (NYC).
FIGMENT: an annual arts event on Governors Island, with artwork in every medium, from installation to performance to music to games and many things in between
Islip Art Museum / Carriage House: project space for contemporary exhibits.
Jamaica Center for Arts and Learning: offers diverse programs to artists of Queens and greater metropolitan area.
LMCC: lower Manhattan Cutltural Council.
nysca.org: NY State Council on the Arts. Offers grants to organizations, and a great resources section with lists of very useful websites.
Artcalendar.com: business magazine for visual artists. Also see their webinar listed below.
The Art List- Monthly e-Newsletter and searchable database listing upcoming Art Contests, Art Competitions, and Opportunites for visual artists and photographers.
ArtDeadlines.Com: A searchable database and magazine that lists local and national juried artist competitions, grants, call for submissions, art jobs, art festivals, residencies, fellowships, & more.
Artdeadlineslist.com: A monthly newsletter (via email or paper) with several hundred announcements every month.
Festivals.com: information about community festivals, including film, visual arts, music, and other cultural events
The Urban Art Commission: list of public art commissions and opportunities
