Last year Noctua released their NH-L9 series low profile CPU coolers. They were extremely small (37mm) and offered some pretty good cooling as well. Noctua is back with a new low profile cooler that they were showing at Computex. This cooler is just a little bit bigger at 65mm high, but still will fit in compact systems pretty easily.
This low profile L-Type cooler is 95mm by 95mm wide and has 100% RAM compatibility and PCI Express compatibility on mini-ITX systems. It also looks like the cooler packs two large heatpipes, which should offer better performance over the previous NH-L9 series. The cooler makes use of a NF-A9x14 PWM fan.
No word yet on pricing or availability as this was just a prototype.