NovoIcons is the best icon extractor. It's simple and intuitive, but has more features than the competition. It can extract icons and export them into PNG, TIFF, GIF, JPG, or ICNS. 512x512 icons are fully supported. While this version is almost 3 years old, it still functions well. Version 2.0 is under way, but it is barely into development so it will be a long time until release.
What's new in this version:
- High-resolution icon
- Refreshed links and copyrights
- Completely removed update capabilities
- Removed preferences (not needed without autoupdate)
Since the code was lost, this update only affects visible functions. Autoupdate has been removed.