Mactracker is a comprehensive database of every Apple product ever made.
You search for details on your old iBook or your recent rediscovered iPod Classic, Mactracker will tell you everything you need to know.
Mactracker provides detailed information on every Apple Macintosh computer ever made, including items such as processor speed, memory, optical drives, graphic cards, supported Mac OS versions, and expansion options. Also included is information on Apple mice, keyboards, displays, printers, scanners, digital cameras, iPod, Apple TV, iPhone, iPad, Wi-Fi Cards/Base Stations, Newton, and Mac OS versions.
Mactracker is freeware.