ARM active development boards
http://armlinux.simtec.co.uk/kautobuild/2.6.15-rc2/index.html

ARM Assembly
http://www.heyrick.co.uk/assembler/

ARM Linux Developer
http://www.arm.linux.org.uk/developer

Debian GNU/Linux on ARM
http://www.debian.org/ports/arm/

devmem2
http://free-electrons.com/pub/mirror/devmem2.c

ecos
http://sources.redhat.com/ecos/

Embedded GNU/Linux Journal
http://www.linuxjournal.com/tag/embedded

Free Electrons
http://free-electrons.com/news/news.2004-09-28/en

Free-electrons: Embedded boards
http://free-electrons.com/community/hardware/boards

Kegel Cross toolchain
http://kegel.com/crosstool/

KwikByte.com boards
http://www.kwikbyte.com//

lex and yacc in embedded systems
http://www.embedded.com/story/OEG20030220S0036

LARTware
http://www.lartmaker.nl/lartware/blob/

Linux Devices
http://www.linuxdevices.com/

opencollector
http://opencollector.org

Opencores.org
http://www.opencores.org

OpenOCD
http://www.amontec.com/openocd.shtml

opersys guide
http://www.opersys.com/dox/opersys-quickref-1.0.5.pdf

penguin ppc
http://penguinppc.org

Simtec Electronics
http://www.simtec.co.uk/

TuxScreen
http://www.tuxscreen.net

u-boot
http://sourceforge.net/projects/u-boot

ucLinux
http://www.uclinux.org/