Literally 'the Children of Noah', this "movement" of decidedly Orthodox Judaism seeks to convert non-Jews (primarily Christian) by way of acceptance of the Seven Laws of Noah. Isn't meme warfare wonderful?
The Chavurath B'nei Noach (Covenant of the Children of Noah) chapter of Fort Worth, Texas has a classy website at <http://webpages.charter.net/chavurathbneinoach/>. Their main vector appears to be substituting the concept of eternal life through Christ with that of eternal life through the Torah and mitzvot, and replacing the Christian Messiah with the Jewish Moshiach.
Proudly anti-missionary, "Chavurath B'nei Noach has pledged to be partners with the Jewish organizations countering the efforts of deceptive missionary and cult groups targeting the Jewish community for conversion." Such organizations include Jews for Judaism, Outreach Judaism, Project Truth, The Jewish Defence League and Shomrai HaBrit (Keepers of the Covenant).
Naturally, the other side's getting its paws dirty too.