Gen 1: Jigglypuff HMs: Bulbasaur's line, Butterfree, Electabuzz, Dragonite, and Slowpoke's line
Gen 2: Can't decide between Cyndaquil and Typhlosion HMs: Misdreavus, Lugia, Heracross, and Crobat
Gen 3: Sceptile HMs: Ralts's line, Banette, Dusclops, and Shiftry
Gen 4: Electivire HMs: Dusknoir, Torterra, Mismagius, Staraptor, and Drapion
Gen 5: Lilligant HMs: Snivy's line, Chandelure, Haxorus, Cofagrigus, and Galvantula
Gen 6 (so far): Froakie HM: Xerneas
There are probably others, but I forget as of now.