4 Pin Molex Connector - Right Angle
The 4-pin Molex connector is pretty standard for disk drives, computer peripherals and things like that but it's also a great general purpose power connector.
If you're using a computer power supply to juice-up your project, this is a nice clean way to hook it up.
These right-angle connectors have 4 pins spaced 0.200" as well as plastic stress-relief posts and clips.
Documents: