XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
IcoFX - IcoFX is an all-in-one solution for icon creation, extraction and editing.
Seer - A Windows Quick Look Tool in Qt.
JDraw - Open Source SF.net
IrfanView - IrfanView ... one of the most popular viewers worldwide.
IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files