Pangender is a term used to describe people who feel that they cannot be labeled as male or female in gender. As such it has a great deal of overlap with genderqueer. Pangender people feel that they do not fit into binary genders, instead identifying as mixed gender (both male and female) or as a third gendered. The term is sometimes used by some in the LGBT community, such as the Radical Faeries to be one that is inclusive, meaning “all genders”.
There is also such a thing as bi-gender, and trigender as well as two-spirit all of which are similar to pangender.
Bigender, bi-gender or bi+gender describes a tendency to move between feminine and masculine gender-typed behaviour depending on context.
Trigenderism is a gender identification or feeling that a person is moving between or among gender identities: male, female and a third gender (genderless, a mix of male and female, or any other variety of genderqueer identities).
Two-Spirit People (also Two Spirit or Twospirit) is from Native American culture and is usually used to indicate a person whose body simultaneously houses a masculine spirit and a feminine spirit. The term can also be used more abstractly, to indicate presence of two contrasting human spirits (such as Warrior and Clan Mother) or two contrasting animal spirits (which, depending on the culture, might be Eagle and Coyote).