TunnelMail   
http://www.digitallabs.net

TunnelMail uses the SSH Secure Shell's encrypted tunneling to allow remote users to connect to internal network mail resources. Compatible with with all SSH servers that allow tunneling, and tested with multiple mail servers, such as Exchange Server, Lotus Domino, Postfix, Courier, Sendmail, and others that implement IMAP, POP3, and SMTP.

TestMailer   
http://www.digiarch.org

Test Mailer enables you to quickly send an email and monitor or debug all communication with the recipient mail server. There is no need for a smtp server, Test Mailer will act as a mail server itself and lookup the MX records for the recipient. Use the advanced options to create special circumstances and save the communication log to inform postmasters about any configuration problems in their email or mail server setup. Typical use: - An email message is rejected by a mail server, review the complete communication. - A message does not arrive at it's destination, verify the mx records for the domain and mail servers involved in the delivery process. - Send a quick test message to verify if your mail server act's as an open relay server. - Verify the authentication and methods for authentication with a mail server. - Lookup mx records for a domain and verify if the fall back mx records and mail servers are working as they should. - Debug any spam or virus filters that might reject a message in special circumstances. Key features: - Automatic lookup for MX records. - Automatic reference numbering for each test message. - MRU list for frequently used email addresses. - Save communication reports.

NetDog Internet Filter   
http://www.NetDogSoft.com

Special Intelligent Filtering Engine blocks porn contents in/out your Internet (such as Web sites, e-mails, net chat contents, FTP, P2P). The filtering engine examines in real-time all the data being transmitted and received through any Internet applications. NetDog also block URLs you have defined.(supports WildCard Characters '?' and '*' in URL, also you can define a word such as "porn", that means all URL contain word "porn" will be blocked). You can also block all URLs except some special URLs you have defined not to block. None can stop filtering, except logining into NetDogAdmin to change setting by passwords. After Installed NetDog, Please test to visit those Urls like: PlayBoy.com, to-porn.com... If you can not open those porn sites, that shows your netdog is working ok now.

MSU NoiseGenerator VirtualDub plugin   
http://www.compression.ru

The filter adds artificial noise of one common types (equidistributed, normaldistributed, colour stains, echo signal) to video stream. It can be used for testing, debuging and comparison of various denoising filters. 'Settings' dialogue box allows to select type of noise to generation. Noise intensity can be specified for each colour component (the filter uses YCrCb colour space). Individual noise parameters also can be changed for some noise types.