Hardware support
osx86project – list of suported hardware + support forum
http://www.osx86project.org/
DSDT Databases, Patches and tools
DSDT patches by mainboard
http://olarila.com/forum/packs.php
DSDT patches for specific hardware
http://olarila.com/forum/patches.php
DSDT editors and patchers
http://olarila.com/forum/viewtopic.php?f=19&t=62
http://maciasl.sourceforge.net
Kexts and Kext Utilities
KEXT Database + useful tools
http://www.kexts.com/
Kext Utility
http://cvad-mac.narod2.ru/Kext_Utility
Bootloaders and utilities:
myHack bootloader and after install utility
http://myhack.sojugarden.com/guide/
kakewalk boot loader
http://www.kakewalk.se/
empireEFI / nawCom Boot CD
http://prasys.info/osx86hackint0sh/