Furazadrol (androfurazabol; 5α-androstano-[2,3-c]furazan-17β-tetrahydropyranol ether), DMZ (dimethazine; 2α,17α-dimethyl-5α-androstan-17β-ol-3,3′-azine), & Ultradrol (methylstenbolone; 2,17α-dimethyl-5α-androsta-1-en-17β-ol-3-one).
Though I don't regard these as truly exotic - in that class I would place the 2-enes like Mithras (dimethandrostenol; 2,17α-dimethyl-17β-hydroxy-5α-androst-2-ene), the 13β-ethyl gonanes like M-LMG (methoxygonadiene; that may act in part as prodrugs) and THG (tetrahydrogestrinone; 13β,17α-diethyl-17β-hydroxy-4,9,11-estratrien-3-one) that is highly potent despite relatively weak AR potency (24.59% vs. DHT), and probably works principally by modulating glucocorticoids.