Four branches of Judaism

Orthodox: Members strictly follow dietary laws and Sabbath observance and also tend to follow special dress and grooming requirements (e.g. no cutting of the beard or hair from the sides of the head). Emphasis on adherence to the letter of tradition in the Torah and Talmud. This branch includes Hassidic Jews, who combine stirct observance to Jewish Law with mysticism. Women and men separated during worship. Analogous to Amish or some Fundamentalist Protestants.

Conservative: Began as a 19th Century reaction to Reform Judaism. Members embrace modern dress. Women have more room to move out of traditional roles as mothers and homemakers. Admitted women Rabbis starting in the 1980s. Still follow nearly all Jewish laws. Analogous to Protestant Evangelicals.

Reformed: 19th century movement in Judaism among Jews who wanted to move into the mainstream of European society. Dietary laws, Sabbath observance optional, though often observed. Later equality for women and homosexuality was seen as acceptable. The Tanakh's ethical teachings are emphasized over ritual and ceremony, and services are often conducted in the native language of the congregation rather than in Hebrew. Analogous to modern "mainline" Protestant denominations such as the Episcopalians, Presbyterians, Methodists or  Lutherans.

Reconstructionist: Founded in America by Rabbi Kaplan in 1922. More liberal than Reformed Judaism and criticizes aspects of Judaism as racist, sexist homophobic. The congregations are often politicized and very syncretistic (including aspects of other religious traditions). They reject the concept of miracles and even the idea of a personal God, as well as the concept of the Jews as a "chosen people, seeing Judaism rather as an evolving community. Analogous to followers of ministers such as Episcopal Bishop John Shelby Spong or John Domminick Crosson. This group is small but seems to push Reformed Judaism in a more liberal direction. For example, Rabbi Kaplan performed the first Bat Mitzvah (coming of age ceremony at the onset of adolescence; analogous to Bar Mitzvah for a boy). Now this ceremony is practiced in Reformed Judaism as well.