Sorry for the lack of comments on some links as I'm just a little lazy as you might have guessed by now :))

+Greythorne The Technomancer.  More commonly known as +Gthorne.  One of the best and most helpful reversers around.   +His web page shows just a small fraction of his knowledge but it is well worth a visit, especially if you want to learn to program in assembler.  Gthorne has all the ORCpacks (a complete set of *everything* used by +ORC in his tutorials) and also mirrors Fravia+'s site.

Stone's webnote.  Home of Stone [UCF].  Contains many runtime tools, encryption   and other general stuff, *very* interesting, but maybe slightly advanced for newbies, decide for yourself.

Fravia's Fortress.  You should know what this is, be ashamed if you do not.  The largest collaboration of knowledge of cracking on the whole web I think, over 300 essays from various crackers, + or otherwise.  If you want to learn to crack, you will *always* find something here to help, and something you didn't know before.  I think this link is dead so you can try this one instead http://crazyboy.com/fravia/fravia.org/

Messing In Bytes.  A group similar to cracking4newbies [Mex] except they do not release any cracks.  They are excellent reversers, with a mine of knowledge on their site, ALL of which should be studied, beginners - intermediate.  Or you can have a look at my mirror of their site here.

Kottos.  I have Kottos' tutorials on the tutorial page and I also mirror his site here.  He is an excellent reverser, with a keen eye on the advancements of the cooledit protection series.  Well worth reading.

Obsession.  This group produce their own tools, not really for reversing, but they release the sources for al their bits and pieces which makes it very interesting, along with the actual quality of their tools.

+MalaTTia.  Another of the best reversers around, MalaTTia specialises in keygenerators, as you may have noticed +His essay about Netscape Cache Explorer at Fravia's site.  His new site has many lessons and tools which are certinaly worth getting.  I also agree with Fravia+ in that +He seems to have a good nose for sniffing out talented crackers :))

DaSavant.  Member of Anthrax, good cracker and friend of mine.

The+Chineese : Another intersting site from a +HCU member.

Assembly page : This is one of the best places for getting started on learning assembler in my opinion.  It has many links to the best sites and tutors.

Quantum-X : This is a relatively new site but still it contains plenty of information and tools.  I love the graphics also :))

Crackme page :  This famous page was resurrected recently by Prophecy and he is certainly doing a great job.  Go here to get most of the crackmes available on the scene.

tHErAIN's homepage : Games cracking related page from this excellent UCF member.

YTC's page : Another good page with tools, tutorials etc.

SuddenDischarge : One of the old famous ones with all the executable tools you could ever want like cryptors, unpackers etc. etc.

Suby's homepage : Well worth visiting.

Flu[X]'s homepage : PC member and author of many tutorials and a great patching engine.  Visit this site :)

The Sandman : An amazing site with a plethora or tutorials all written by this dude.

HarvestR's site : Plenty of tools and other good things here.

Iczelions cracking page : This guy is soooo good, he has an excellent page too, visit for youself and download all you want.

Win32asm : Page maintained by Iczelion.   Contains EVERYTHING you will ever need to get started - and finished win32asm programming including the compilers, sources, links, tutorials and more.

Marquis De Soiree : Former UCF prezident and author of some of the best cryptors around.  I must say, I do agree strongly with his taste in women :))