You are welcome to add your frequently used resources.
1. Open Source/documentation/community/Information Resources
1.01 http://www.kernel.org
Linux Kernel Homepage
1.02 http://www.gnu.org or http://www.fsf.org
GNU/FSF Homepage
1.03 http://www.opensource.org
Open source authoritative website
1.04 http://www.osdl.org
Osdl (Open Source development labs, home of Linus Torvalds)
1.05 http://www.sourceforge.net
Large Open Source Software websites
1.06 http://freshmeat.net/
Large Open Source Software websites
1.07 http://osdir.com
The Open Source Directory provides indexes and links for many open source software.
1.08 http://www.rpmfind.net
Provides RPM package search and links
1.09 http://oss.sgi.com/projects/
SGI open source Linux Project
1.10 http://oss.software.ibm.com/linux/
IBM open source Linux Project
1.11 http://www-124.ibm.com/developerworks/oss/
Open source Linux project on IBM developerworks
1.12 http://www.kerneltrap.org
Kernel development information and forums
1.13 http://kernelnewbies.org
Good kernel learning website
1.14 http://www.kernelhacking.org/
Kernelhacking-howto documentation
1.15 http://www.tldp.org
Linux document
1.16 http://www.nongnu.org/lkdp/
Linux Kernel documentation
1.17 http://linux-mm.org/
Linux Kernel mm documentation
1.18 http://www.linuxforum.net
China Linux Forum
1.19 http://www.aka.org.cn
China Information Technology Forum-aka)
1.20 http://www.lisoleg.net
Linux source Learning Group)
1.21 http://www.linuxfans.org/
China Linux community
1.22 http://www-900.ibm.com/developerWorks/cn/linux
IBM developerworks Linux Zone
1.23 http://www.linuxaid.com.cn
Linuxaid Technical Support Center
1.24 http://lxr.linux.no/source/
Cross-referencing Linux allows you to view the Linux kernel source code online
1.25 http://www.linux.org
Linux Information Resources
1.26 http://www.linuxdevices.com
Embedded Linux Information Resources
1.27 http://www.linuxjournal.com/webindex.php
Linux journal Magazine online articles
1.28 http://www.joyfire.net/
This site is maintained by joyfire
1.29 http://lwn.net
Linux weekly news
1.30 http://www.ctyme.com/intr/int.htm
Bios System calls are comprehensive
2. project resources
2.01 http://perso.wanadoo.es/xose/linux/linux_ports.html
Linux porting Project LINK Resources
2.02 http://www.uclinux.org
UClinux Homepage
2.03 http://www.fsmlabs.com/or http://www.rtlinux.org
RTLinux (Real-Time Linux) Homepage
2.04 http://mail.aero.polimi.it /~ Rtai/
Rtai (real time application interface for Linux) Homepage
2.05 http://www.ittc.ku.edu/kurt/
Kurt-Linux (Kansas University Real-Time Linux) Homepage
2.06 http://www.arm.linux.org.uk/
ARM Linux Homepage
2.07 http://www.linux-mips.org/
Linux/MIPS Homepage
2.08 http://penguinppc.org/
Linux/PowerPC Homepage
2.09 http://www.denx.de
Denx software engineering, PowerPC embedded Linux Resources
2.10 http://www.netfilter.org/or http://www.iptables.org/
Netfilter/iptables Project
2.11 http://www.linuxfromscratch.org
LFS (Linux from scratch) project
2.12 http://www.uclibc.org
Uclibc (C library for developing embedded Linux systems) Homepage
2.13 http://www.LinuxVirtualServer.org
Chapter ‑ Linux virtual server project
2.14 http://linux-ha.org
High-availability Linux Project
2.15 http://www.lids.org
Lids (Linux Intrusion Detection System) Project hosted by vertex
2.16 http://www.minigui.org/
MiniGUI Project hosted by Kongming
2.17 http://user-mode-linux.sourceforge.net/
User-mode Linux Project
2.18 http://lse.sourceforge.net/
Linux scalability effort Project
2.19 http://linuxperf.nl.linux.org/
Linux Performance Tuning Project
2.20 http://euclid.nmu.edu /~ Benchmark/
Linux benchmark project