這個軟體可以查的有
MSN Messenger
Windows Messenger (In Windows XP)
Yahoo Messenger (Versions 5.x and 6.x)
Google Talk
ICQ Lite 4.x/5.x/2003
AOL Instant Messenger (only older versions, the password in newer versions of AIM cannot be recovered)
AOL Instant Messenger/Netscape 7
Trillian
Miranda
GAIM

http://www.nirsoft.net/utils/mspass.html
原開發的團隊還有開發其他的軟體.也很值得一用

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