I've been trawling around the Internet looking for free d20 stuff and
have found a website that I think produces stuff of the same sort of
quality as Mad Irishman*.

That website is The Other Game Company, an web based d20 publisher
that actually puts out a very large amount of free stuff, including
PDF versions of the entire 3.5 SRD! If you are not jumping up and
down right now then perhaps you are not aware that the SRD is
basically almost all of the rules from Wizards of the Coast's
Dungeons and Dragons - Players Handbook. In fact if you download and
print off these PDF files you would probably only need to have one
PHB per player group.

If this isn't enough they have made monster stats for every type of
Hydra you can shake a stick at and a number of other things to help
games masters.

Have a look around:

http://www.theothergamecompany.com/

today. Or if you want to go straight to the SRD download links then
I've listed them at:

http://uk.groups.yahoo.com/group/virtualeclipselrp/links/d20_system_00
1071937434/Rules_001072648085/

I hope you like them as much as I do.

David "Big Mac" Shepheard
Webmaster
Virtual Eclipse
http://uk.groups.yahoo.com/group/virtualeclipselrp/
http://virtualeclipse.aboho.com/

* = If you haven't heard of Mad Irishman either then where have you
been? This man has been creating great character sheets for many
years and shares them with the world for free. In fact Mad Irishman's
sheets are so well organised that the main tabletop RPG Games Master
insists that we don't use anything else!

Have a look around his website as well (if you haven't already got it
bookmarked):

http://www.mad-irishman.net/

Oh and by the way, if you are looking for d20 compatible character
sheets go to his Dungeons and Dragons section as there are a lot more
there than in the d20 section.