SniffPass
SniffPass 1.13 for Windows
NirSoft Freeware
capture the passwords that pass through your network adapter.
SniffPass is small utility that listens to your network, capture the passwords that pass through your network adapter, and display them on the screen instantly. SniffPass can capture the passwords of the following Protocols: POP3, IMAP4, SMTP, FTP, and HTTP (basic authentication passwords). You can use this utility to recover lost Web/FTP/Email passwords.
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Software Summary:

You can run SniffPass on Windows operating systems. SniffPass is a software product developed by NirSoft Freeware and it is listed in the category. SniffPass is a free software product and it is fully functional for an unlimited time although there may be other versions of this software product.

Alternatives in on Windows