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Windows Key is simple to use, and it can reset both local (standard version) and domain admin account (Enterprise edition only) passwords. It promises a 100% recovery rate. Although Windows Key has a free trial, you'll have to pony up for the full version (Standard $39.00 USD, Enterprise $295.00 USD) before you can really recover any passwords.
Windows Password Unlocker also creates a USB or CD that can then be booted to recover passwords.
There are three editions of this tool: Standard ($19.95 USD), Professional ($29.95 USD), and Enterprise ($49.95 USD). Only the Enterprise and Professional editions can recover passwords. (Enterprise can even recover domain admin password.) The standard version simply removes the passwords, and it doesn't support the USB flashdrive method.