Terran: Turbo Reaper

Build Order:

10 Barracks (Proxy)
10 Refinery
11 Supply Depot
11 Tech Lab on Barracks
11 Orbital Command
Reaper

Do as much damage as you can until the first Stalker or Queen chases you off. Transition into a MMM build.

Terran: 4 Barrack Marine Push

Build Order:

10 Supply Depot
12 Barracks
13 Supply Depot to finish wall in
14 Barracks
15 Barracks
16 Barracks

From here build Marines, move out at about 4-5 marines.

Zerg: 7 Pool Rush

Build Order:

7 Drone
6 @ 200 minerals build Spawning Pool
8 2 Drones
11 6 Zerglings (Extractor trick)
11 Overlord
* 11 Spine Crawler

* Optional

Make more Zerglings to support your initial wave.