Limmud NY works to promote Jewish learning and cultural celebration through an annual weekend of events in New York City. Sivie Twersky is its president.

Jews for Judaism is an international organization that aims to help Jews strengthen their heritage and counter attempts to convert Jews to other religions. It has branches in several cities, including Baltimore and Los Angeles.

The Institute for Jewish Spirituality uses Torah study, prayer, mindfulness meditation, yoga and spiritual direction and retreats to nurture deeper spirituality among rabbis, cantors and lay people. It is based in New York City but now has a Northern California branch. Rabbi Lisa Goldstein, a Reform rabbi, is its executive director in New York.

The Goldring/Woldenberg Institute of Southern Jewish Life in Jackson, Miss., works to bring educational and rabbinic services to isolated Jews and Jewish communities in a 13-state Southern region. Macy B. Hart is president.

Gateways is a nonprofit organization that works to fight assimilation by connecting Jews to Jewish life, religion and culture. It is based in Monsey, N.Y. Its founder and director is Rabbi Mordechai Suchard.

The Foundation for Jewish Culture provides grants, awards and other opportunities to individual artists and scholars who it believes will advance Jewish culture and community. At present, the foundation does not have a staffed office.

Footsteps helps members of the ultra-Orthodox and Hasidic communities who wish to leave them make the transition to mainstream Jewish life. Lani Santo is executive director.

Edah is an organization of Modern Orthodox Jews who seek greater openness to the world than does traditional Orthodox Judaism. Edah was founded in 1997 and ceased formal operations in 2006, but its website continues to post useful contacts and information, including a lengthy list of speakers/experts and a library. Rabbi Saul J. Berman is director.

Clal, the National Jewish Center for Learning and Leadership, is a think tank dedicated to training Jewish leaders and enhancing spiritual and civic involvement in American life. Rabbi Irwin Kula is president.