Pixel Tools
Programs
Photoshop/Imageready - http://www.adobe.com
Pixen - http://www.opensword.org/
GraphicsGale - http://www.tempest-j.com/gale/e/
GFX Convertor - http://www.etrusoft.com/graphic-converter/
Unfreez - http://www.whitsoftdev.com/unfreez/
GraFX 2 (Win32) - http://www.eclipse-game.com/?dat=7
The GIMP - http://www.gimp.org/
Art Rage - http://www.ambientdesign.com/artrage.html
EasyToon - http://www.superfundungeonrun.com/eztsetb3.zip
RePix - http://pascalman.altervista.org/RePix_v2.0a.zip
Ulead GIF Anitmator Lite - http://www.neowulf-nexus.com/Pub/NewMedia/uleadgif.zip
Dogwaffle - http://www.squirreldome.com/cyberop.htm
Promotion - http://cosmigo.com/promotion/index.php
Ultimate Paint - http://www.ultimatepaint.com/
JDraw - http://www.j-domain.de/en/jdraw.php
Allegro Sprite Editor - http://ase.sourceforge.net/

Tools
Compaq HP TC1000 - http://www.tabletpcbuzz.com/features/article.asp?ID=10
Tablet PC - http://h18000.www1.hp.com/products/tabletpc/
(recorders)
Capture Pad - http://www.capturepad.com/
Camtasia - http://wcarchive.cdrom.com/pub/bws/bws_48/camtasiaf.exe

Tricks
Transparent PNG's in MSIE - http://webfx.eae.net/dhtml/pngbehavior/pngbehavior.html
Mozilla Firefox (transparent PNG's) - http://www.mozilla.org/products/firefox/
Silvir's Kickass Tile Script - http://www.silvir.com/tile.php?src=http://www.yourimage.com/source.gif
(Just replace the src url with your image's url and check your tiles easily)

Pixel Tutorials
Isometric Tutorials
Zoggles - http://www.zoggles.co.uk/asp/tutorials.asp?show=index
Pixelfreak - http://www.pixelfreak.com/tutorial/
RhysD - http://rhysd.syntesis.org/tutorial/
http://www.webclass.ru/tut.php?tut=129
http://www.deviantart.com/view/2866522/
Pixel NascImpact - http://pixel.nascimpact.com/tutoriaux.php
http://www.decile.net/tutorials/photoshop/techniques/pixel/

General Pixel Art Tutorials
Tsugumo - http://pixeltutorial.cjb.net/ (the original!)
StOven (old)- http://www.spritedomain.net/tutorials.htm
StOven (new) - http://www.spriteart.com (it's not live yet, but we're all trembling in anticipation)
Zoggles - http://www.zoggles.co.uk/asp/tutorials.asp?show=index
Gas13 - http://gas13.ru/tutorials/
Nemesis (AA) - http://www.rpi.edu/~laporj2/essays/aa/
Pepand Helm (coloring/shading) - http://www.rpi.edu/~laporj2/essays/tagteam/
Blackeye Software - http://www.ocf.berkeley.edu/~derekyu/ (it's under Miscellaneous)
Matriax - http://www.speccy.org/remakesgraph/tutoriales/tuto.htm
Biomors - http://home.houston.rr.com/monkeygraphics/texturetutorial/
Biomore :P - http://home.houston.rr.com/monkeygraphics/treetutorial/
Enterbrain - http://www.enterbrain.co.jp/digifami/digiweb/dot_teck/3nen/3_01.html (Japanese only, but worth digging around for stuff)
PixelZone Tutorials - http://pixel-zone.rpgdx.net/shtml/tutorials.shtml
Mozco Metallic Objects - http://www.tcp-ip.or.jp/~s-iga/tips/2-3metallic_objects.html
Drububu - http://www.drububu.com/tutorial/flashtival.html (combining Flash and pixels)
Vlink.Vwalker.com - http://home.earthlink.net/~marktroup/vlinkdotvwalkerdotcom/vlink.html
(please note that the original vlink site disappeared, this is what I salvaged from my hd)
http://koti.mbnet.fi/~aholattj/pixeltut/
Natomic - http://www.natomic.com/hosted/marks/mpat/
OurCall - http://www.ourcall.org/
http://www.pixel2life.com/tutorials/photoshop.php?tut=4&subtut=42

Backgrounds
http://www.barnettcollege.com/tutorial1.htm
http://allitis.com/agast/backgroundex1.html
http://www.gfxartist.com/features/tutorials/27609

Colouring
http://elfwood.lysator.liu.se/farp/colorps/pcolorps.html
http://www.sijun.com/dhabih/mainscreen.html

Details
http://www.elverquisst.se/grasstut.html
http://www.optidigit.com/stevens/cloudtut.htm

Animation Tutorials and Reference
Eadweard Muybridge - http://web.inter.nl.net/users/anima/chronoph/first-15/index.htm
http://www.brianlemay.com/animationexamples/animationindex.html
Preston Blair - http://www.freetoon.com/index.html
http://www.idleworm.com/how/index.shtml
Don Bluth - http://www.donbluth.com/academy.html
http://www.awn.com/tooninstitute/lessonplan/lesson.htm#top

Pixel Art Forums
Pixelation - http://web1.t43.greatnet.de
PixelDev - http://www.pixeldev.net

Pixel Fonts
Bitmap Font Utility - http://www.stefan-pettersson.nu/site/bmpfont/
Creating a Pixel Font from Scratch - http://www.iamcal.com/misc/fonts/pixfonttut/part1.php
04 - http://www.04.jp.org/ (free pixel fonts... what are you waiting for? Click!)
Atomic Media - http://atomicmedia.net/
Fontographic - http://www.fontgraphic.com/

Pixelized Eye-Candy Goodness
1x1 - http://www.vasava.es/1x1/
Adam Tierney - http://www.adamtierney.com/ (Sals)
Adeptvormgeving - http://www.adept-vormgeving.com/
Ala Webstatt & Chmork.net - http://www.ala.ch/portfolio/
Army of Trolls - http://www.armyoftrolls.co.uk/
Artoholic - http://artoholic.eg-games.com/ (Emlan)
@Pixel - http://www.gawzu.idv.tw/
Bongo - http://park12.wakwak.com/~bongo/
Dot16 - http://www.dot16.pixeltemple.com/
Drububu - http://www.drububu.com/
Eboy - http://www.eboy.com/
Electriciconland - http://electriconland.com/
Etherbrian - http://www.etherbrian.com/
Etherknot - http://members.tripod.com/~etherknot/
Final Redemption - http://finalredemption.com/index.htm (Kon)
FlipFlopFlyin' - http://www.flipflopflyin.com/
FlyGuy - http://www.trevorvanmeter.com/flyguy/
Fuz.dk - http://www.fuz.dk/
Habbo - http://www.habbohotel.com/
Henk Nieborg - http://www.henknieborg.nl/home.html (don't miss this one!)
Head Over Heels - http://retrospec.sgn.net/games/hoh/screenshots.html (cuz it makes me smile)
I'm With Zombie - http://www.imwithzombie.com/ (Foogirl)
Kenneth Fejer - http://www.kennethfejer.dk/
Keops Online - http://www.llama-land.net/keops/online/
Ku_Bo - http://members.at.infoseek.co.jp/KU__BO/dot.html
KYMG - http://wf.31rsm.ne.jp/~kymg/top.htm
Lexaloffle - http://www.lexaloffle.com/ (so... damn... cute)
Littlefactory - http://www.littlefactory.com/
Lovepixel - http://www.lovepixel.idv.tw/
Meertoh - http://meertoh.tk/
Meomi - http://www.meomi.com
Move Your Feet - http://www.veer.com/ideas/move/
Mr. Wong's - http://www.mrwong.de/
Nvision - http://www.nvisionillustration.com
Ocee - http://ocee.de/
Pepepue - http://www.pepepue.com/
PixelBlocks - http://www.pixelblocks.com/cgi-bin/WebObjects/pbonline
Pixelfreak - http://www.pixelfreak.com/
PixelHugger - http://www.pixelhugger.com/
PixelJam - http://www.pixeljam.com/core/index.html
PixelMuseum - http://www.pixelmuseum.com/
Pixel NascImpact - http://pixel.nascimpact.com/
Pixture Studio - http://www.pixture.com/
Ptoing - http://www.ptoing.net/
Quickhoney - http://www.quickhoney.com/
RO Monster Database - http://www.roempire.com/database/?page=monsters&act=view
Supertotto - http://www.supertotto.com/
Tanuki X - http://www.christessmer.com/
These Words Escape - http://www.wolfz.com/~rhino/delgneith/ (delgneith)
Weapon X - http://www.2600comic.co.uk/logan/ (Wolverine)
YipYop - http://www.yipyop.com/ (biscuit theater ^_^)

Community-Driven Pixel Art Sites
PixelDam - http://www.pixeldam.net/
IsoCity - http://www.kennethfejer.dk/isocity/
Wee! - http://home.earthlink.net/~marktroup/wee/
PixelGala - http://www.pixelgala.org/

Video Game and Sprite References
The Video Game Museum - http://www.vgmuseum.com/
Game Sprite Archive - http://www.gsarchives.net/index2.php
EmuGifs - http://www.emugifs.emuita.it/
ShyGuy Kingdom - http://tsgk.captainn.net/

Demo Scene
GFX Zone - http://www.gfxzone.org/frames.html

Making Games
No links here yet

...and of course http://www.google.com is always your friend. ;