AfterLogic XMail Server Windows Edition

AfterLogic XMail Server is a free open source e-mail server available for Windows and Linux platforms. Supports ESMTP, TLS/SSL secure connections, SMTP authentication, account and domain aliasing, anti-spam features (IP-based and e-mail address based),mailing lists, logging, remote administration, Finger protocol, filters, custom mail processing, simultaneous multi-user access to a POP3 mailbox. AfterLogic XMail Server is based on open source XMail server. The advantages of AfterLogic XMail Server against original XMail include simultaneous multi-user access to a POP3 mailbox, configuring port numbers via config file, handy Windows installer. The product is shipped under GPLv2 terms for many 32-bit platforms including Windows NT/2000/XP/2003/Vista, GNU/Linux, etc.
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Kismet Wireless Network Sniffer

Kismet is an 802.11 layer2 wireless network detector, sniffer, and intrusion detection system. Kismet will work with any wireless card which supports raw monitoring (rfmon) mode, and can sniff 802.11b, 802.11a, and 802.11g traffic.

Kismet identifies networks by passively collecting packets and detecting standard named networks, detecting (and given time, decloaking) hidden networks, and infering the presence of nonbeaconing networks via data traffic.

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