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