I searched the forums for bookmark topics to be sure I wasn't double posting, but, I'm starting this thread to share bookmarks and/or other resources.
I personally use del.icio.us to manage all of my bookmarks with the Firefox extension; here is my personal del.icio.us account: ixmatus' bookmarks
Notable resources I use often: Rex Research, Lindsay's Technical Books, Programmer/Web Cheatsheets, and Public-Domain Books for Classicists.
Most of my bookmarks are programming, computer, logic, ontology and technical related - I bookmark interesting alt projects that I run across too though (such as the Low Impact Woodland Home project)
If anyone else uses del.icio.us - post up your account!