Basically (I can post decklists later, but just to jump-start you):
Eldrazi Green - Basically a kind of monogreen Elf aggro strategy, with Eldrazi Monument to finish things off.
Boss Naya - The usual suspects in a Naya aggro deck, but this one plays Stoneforge Mystic, Basilisk Collar and Cunning Sparkmage in order to have a repeatable removal effect. Tops out at Baneslayer Angel. Some versions ALSO play Emeria Angel.
Jund - A lot of versions are playing with Rampant Growth, in order to fix mana while ramping, and also to avoid Spreading Seas' blowout. The deck is absurdly resilient, and can fit in just about anything, so it's hard to say what does in nowadays. Mainly Putrid Leech, Maelstrom Pulse, Terminate, Blightning, Bloodbraid Elf, Lightning Bolt, Sprouting Thrinax and Broodmate Dragon. Some versions pack Siege-Gang Commander.
UW Tapout - Control deck. Counters, Day of Judgment, Everflowing Chalice and Spreading Seas (messes up manabases something FIERCE!). Finisher of choice tends to be Sphinx of Jwar Isle, due to shroud.
Br Vampires - Monoblack Vampires splashing red for stuff like Lightning Bolt and Terminate. Also, Malakir Bloodwitch has been making some appearances, due to stopping Baneslayer Angel dead on its tracks.
Wr Allies - Red/White aggro decks, with the cheapest allies and burn. Simple as that.
Boros Bushwacker - Red/White aggro deck with Goblin Guide, Steppe Lynx, Plated Geopede and fetches, but due to Cunning Sparkmage, they fell out of flavor.
UG Polymorph/Summoning Trap - Control deck with counters, some removal, ramping and both Summoning Trap and Polymorph (packs the green enchantment that makes Eldrazi Tokens, Khalni Garden and some others), to put either Progenitus, Iona or, most recently, some big ugly Eldrazi into play fast.
Open the Vaults - Packs a lot of cycling, and wins with the namesake card, mostly returning stuff like Filigree Angel and Sphinx of the Steel Wind. Some versions play Silence as backup to the 1-card combo.