Here are a few cool programs useful for sprite ripping. Some day I'll add more.

Animget - Click here to download
An awesome program for plain old ripping. Written by Michael Menne.
Takes screenshots at an absurd rate whenever the screen changes.
   
Tile Molester - Click here to download

Great tile viewer despite its disturbing name. Needs Java Runtime Environment. Here's a nice tutorial written by Ragey.
   
Tile Molester Alternate - Click here to download

Another version, supports GBA palettes and is extendable. Not quite as stable as the original though.

   
GGD - Click here to download

Weird tile viewer that can do just about anything if you figure it out.
You should really read Ragey's page, he knows all about it. And I really don't.
Arcade
Atari Lynx
ColecoVision
Computer
Dreamcast
DS
Game Boy
Game Boy Advance
Game Gear
GameCube
Genesis
Master System
Mobile
MSX
Neo-Geo
Neo-Geo Pocket
NES
Nintendo 64
PC-98
PlayStation
PlayStation 2
PlayStation Portable
Saturn
Sega 32X
Sega CD
Sega Pico
SNES
TurboGrafx-16
TurboGrafx-CD
Virtual Boy
Wii
WonderSwan
Customs
Skin: