Other religions as Noahide
From the Jewish perspective, if a non-Jew keeps all of the laws entailed in the categories covered by the Seven Noahide commandments, then he or she is considered a Ger Toshav "Sojourning Alien" amid the people of Israel. In fact, this is considered the ideal level for all humanity by Jewish theology. A Ger Tzedek is a person who prefers to proceed to religious conversion, a procedure that is generally discouraged by all sects of Judaism and allowed only after much thought and deliberation over the conversion has taken place.
The term Noahide is not the name of any specific religion but a term used to describe religions and cultures compliant with the Noahide Laws outside of Israel.