These can be umbrella terms for many identities including, but not limited to:
Agender (or neutrois, gender neutral, or genderless) – someone who has little or no personal connection with gender.
Bigender – someone who identifies with both male and female genders, or even a third gender.
Genderfluid – someone whose gender identity and/or expression varies over time.
Genderqueer (or third gender) – someone whose gender identity and/or expression falls between or outside of male and female.
Intergender – someone whose identity is between genders and/or a combination of gender identities and expressions.
Pangender – someone whose identity is comprised of all or many gender identities and expressions.