Reboot is a nonprofit organization that seeks to “reboot” Jewish traditions, particularly for young people, through salons across the country, journals, books and films. It is based in New York City.

The National Havurah Committee is an umbrella organization for havurot, Jewish circles of fellowship, study and prayer. It helps Jews of all denominations and no denomination establish havurot in their areas. It is based in Philadelphia.

The Milken Archive of American Jewish Music takes as its mission to record and document 350 years of American Jewish music, both religious and secular. Neil Levin is the artistic director. The archive has offices in New York City and Santa Monica, Calif.

Mechon Hadar works to revitalize community, prayer and study among young Jews. Rabbi Elie Kaunfer is director.

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.