LinxExplorer   
http://www.linxexplorer.com

LinxExplorer is a link validation tool that enables you to check and validate web sites and local HTML files to find broken links. It checks internal and optionally external links relative to the starting URL and presents the results in real-time. The results can be filtered and exported to HTML or text format. Report can be displayed in the integrated text viewer or external program associated with text or HTML files. You can open and edit multiple local HTML and text files. LinxExplorer logs and displays all protocol specific data exchanged with Web server. Program has built-in color text and image viewer. You can examine downloaded images, ASCII text and HTML files. LinxExplorer supports several Internet protocols: HTTP, HTTPS and FTP. In addition, It supports following proxies: SOCKS4, SOCKS5, HTTP and HTTP tunneling (HTTP CONNECT). Program operates under Microsoft Windows 95/98/Me/NT4.0/2000/XP/2003. Its interface is very easy to use and has multi-document style. You can create many validation and transfer tasks and easily switch between them. While program processes task, it displays checked link tree and link processing statistic. Integrated transfer manager enables to download any file from the Web. Orphan files detection is supported on checking local HTML files and folders.

Mail UnKnown Anti-Spam   
http://www.Ewzy.com

Stop spam with Mail UnKnown. Mail UnKnown does NOT use spam filters to guess what’s spam and what’s not. It uses a Verify then Validate method giving you full control of the emails you receive. All incoming emails are put on hold until the sender of the email is first verified. After they are, you have the option to validate them as an email sender you want to receive emails from. Mail UnKnown is compatible with virtually any email program or service that uses the standard POP3 for receiving email. Here are just a few: Outlook Express, Outlook, Netscape, Eudora, Pegasus Mail, Yahoo Plus email (with email client). Mail UnKnown IS NOT a replacement for your current email service, it works with your existing email

MELMS Pro   
http://www.pawsoft.com

MELMS Pro is a complete email list management and mailing system. Features include: automated subscriber/unsubscriber management, email notification for new subscribers, compose and send emails to subscribers, help system including tutorials and much more! MELMS Pro has been designed to be as easy to use as possible while providing all the functionality you need to manage your mailing lists effectively. A free trial is available.

(STEVEN)   
http://www.softwaredevelopment.net.au

(STEVEN) employs an advance email checking system that validates the sender of the email rather than relying on content to determine if it is spam or not. (STEVEN) does this by automatically replying to all emails it retrieves with a brief message asking the sender to validate the message they sent you. The sender validates it simply by hitting reply and send. This is a once only procedure per sender as once they have been validated it will never need to validate them again. People that send spam very rarely have a valid email address and hence (STEVEN) detects this and determines the email as SPAM. For mailing list you have subscribed to you will have to manually white list these senders once. (STEVEN) will also delete attachments automatically that can be considered harmful to your system. This is an optional setting and you can control which attachments to delete or warn the user about.

Email caster   
http://www.worldminer.com

Email caster is a marketing tool software that can validate emails list and send customized message  directly to recipients and get instant feedback.It has embeded in SMTP relay ,so you do not need using the SMTP relay server of your ISP.In addition,Email caster can give you instant feedback on every email sent ,then you can delete those invalid email addresses from your mailing lists.