Windows Credentials Editor (WCE) allows to list logon sessions and add, change, list and delete associated credentials (ex.: LM/NT hashes and Kerberos tickets). This can be used, for example, to perform pass-the-hash on Windows, obtain NT/LM hashes from memory (from interactive logons, services, remote desktop connections, etc.) which can be used to perform further attacks, obtain Kerberos tickets and reuse them in other Windows or Unix systems. Also dumps passwords in plain-text without the need to crack the hashes. Supports Windows XP, 2003, Vista, 7 and 2008.
Frequently Asked Questions (FAQ) available here.