C.U.M., W.H.O.R.E.S., S.L.U.T., and Other Shadowy Organizations

(And no, they shouldn't all be sex-based or have sex-based acronyms)

What are VIXEN's equivalents to groups like S.H.I.E.L.D, HYDRA, The League of Assassins, The Church of Blood, The Hand, The SCP Foundation, etc.