From Password Unlocker:
IM Password Unlocker is the Instant Messenger password recovery tool that instantly recovers and decrypts the forgotten or lost passwords to the most popular Instant Messengers for all versions. It can not only uncover the unique login password but also recover multiple login passwords stored on the local computer. IM Password Unlocker works with accurate when "Remember my password" checkbox is ticked in Windows Live Messenger / MSN messenger, Google Talk (GTalk), and AOL Instant Messenger (AIM).
What's new in this version:
Version 4.0 may include unspecified updates, enhancements, or bug fixes.