ANT 4 MailChecking 

E-mail checker that lets you know when you have new emails. You can preview headers and messges or delete spam mails directly from the server. It's very easy to set up and use. It even comes with an option to shutdown your PC by email.
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SpreadMsg Lite 

* IMAP email server support! * Interactive 2-way wireless query/response, reply to sender, and info on demand - from your own data sources! * Launch other apps and processes from wireless devices or by email command * Remote email PC control
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Mailwall 

Intercepts all e-mail messages on your network, disassembles them and looks for undesired/illicit content and threats in them: SPAM exploits, macro viruses and malicious HTML code.
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Internet Secure Tunneling 

Internet Secure Tunneling can forward otherwise insecure TCP traffic through encrypted SSH Secure Shell tunnel. You can secure for example DATABASE, POP3, SMTP and HTTP connections that would otherwise be insecure.
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Lydia 

Lydia Email Agent is a small, fast windows program that monitors up to 15 email accounts. Lydia not only notifies you when new email arrives but also filters spam, lets you read your email, reply to email, send email and delete unwanted email.
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BigSpeed Net 

BigSpeed Net lets you set up a virtual private peer-to-peer (P2P) network with friends or co-workers in minutes. It combines transparent data transfer encryption with highly optimized data transfer, on-the-fly compression, user level access control.
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