uCLinux - Embedded Linux

The original uClinux (you-see-linux) was a derivative of Linux 2.0 kernel intended for microcontrollers without Memory Management Units (MMUs). However, the Linux/Microcontroller Project has grown both in brand recognition and coverage of processor architectures. Today's uClinux as an operating system includes Linux kernel releases for 2.0 2.4 and 2.6 as well as a collection of user applications, libraries and tool chains. uClinux is mostly used in Embedded and Gaming device.

uClinux is ported to Cisco routers, Motorola, Intel and many other devices and microcontrollers. Sourceforge location: http://sourceforge.net/projects/uclinux/