ProtoBoard - Rectangle 3"
A basic double sided perf board with a copper pour available for a power or ground plane. Wire your circuit like normal with point to point wiring, and if you need to connect a pin to the copper pour, simply add some extra solder to the joint and jumper to the plane. Standard 0.1" spacing with a 4-40 (3mm) holes for mounting. Great for quickly prototyping stackable circuits.
Product pictures and description are of Sparkfun.com