1、http://www.kdrive.com/   KDrive

2、http://www.handhelds.org/download/     Handhelds org

         http://www.handhelds.org/downloads.html

3.  http://www.toolchain.org    Nightly Automated Tests (NAT)  for several architectures, including glibc builds

         http://www.toolchain.org/websvn/   Subversion Projects

4.   http://nptl.bullopensource.org/    NPTL  Test and Trace

         http://sourceforge.net/projects/nptltracetool/ 

5.   http://www.js-robotics.com/      Robot  JSR-SDK

6.   http://www.robotdiy.com/index.php?menu=1    Do Robot  Yourself

7.   http://csdn.net/subject/LinuxEmbed/    LinuxEmbed subject

8.   http://www.csdn.net/subject/linux/   Linux  Subject

9.   http://os.inf.tu-dresden.de/L4/       L4  Microkernel Family

      http://www.cse.unsw.edu.au/~disy/L4/    

      http://www.gnu.org/software/hurd/hurd-l4.html    Hurd L4

      http://os.inf.tu-dresden.de/L4/LinuxOnL4/         L4Linux

      http://l4ka.org/    

10.  http://www.linux.org.tw/CLDP/        Chinese Linux Documentation Project  CPLD

11.  http://jungla.dit.upm.es/~jmseyas/linux/kernel/hackers-docs.html   kernel Hacker docs

12.  http://www.kernelhacking.org/          kernel hacking

13.  http://linux-mm.org/wiki   Linux Memory Managemant

14.  http://www.nondot.org/sabre/os/articles   Operating system resource center eests and Trace