TEmailserver
TEmailServer is a built-in SMTP server that can simultaneously validate or verify email addresses and send multiple email messages. This component is ideal for building email address validator or verifier and bulk mailer applications. As long as you have an internet connection, you can send... This will enable you to validate email addresses or send email messages at a fast speed. ... Improved mail sending capabilities enable you to send plain text, html, embedded graphics HTML or EML messages. ... Depending on your connection speed and bandwidth, you may be able to create as many as 90...
http://chithai.com/delphi/es41.zip - 606Kb - Download

Chilkat Xml Parser Component
Chilkat XML offers a high-performance alternative to the standard XML DOM for creating, navigating, and manipulating XML documents. The Chilkat XML parser is faster and less memory intensive, and the API is much simpler. There is only one interface, which represents a single node in a parsed XML... Chilkat XML contains a property, "ValidatingParser", which when set to TRUE causes Chilkat XML to use the standard Microsoft XML DOM parser, so you can compare the performance between the two or simply validate the XML if desired.
http://www.chilkatsoft.com/ChilkatXml.exe - 977Kb - Download - Screenshot

NSIPAddress
An ActiveX control that will validate an entered IPAddress and return the ping status. Nice configurable GUI that will also resolve IPs to a machine name and a machine name to an IP. Also return the IP class and type.
http://www.nightshift.co.za/download/ipaddress.exe - 83Kb - Download - Screenshot

WakiMail
WakiMail is a email component. It can be used on asp. net or winform program to send email. The most difference from framework's email class is it support SMTP validate. It's very easy to send email using it. And it's absolute free now.
http://www.aspxcontrol.net/download/wakimail.zip - 8Kb - Download

CSE HTML Validator Professional
CSE HTML Validator Professional is a fast, powerful, highly user configurable, and easy to use professional web development tool that helps you create syntactically correct and accessible HTML, XHTML, and CSS documents. The new HTML Tidy Tool can even fix HTML and XHTML (and more). ... The latest version of CSE HTML Validator includes accessibility checking (Section 508 and WCAG), CSS syntax checking, link checking, spell checking, a powerful, easy to use, integrated HTML/text editor, an integrated web browser (browse the web while you validate the pages), and a powerful Batch Wizard that...
ftp://ftp.htmlvalidator.com/pub/htmlval/csesetup.exe - 4Mb - Download - Screenshot

Email caster
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...
http://www.worldminer.com/emailcaster.exe - 699Kb - Download - Screenshot

Gastown C# Command Line Parser
The Gastown C# Command Line Parser easily and reliably handles parameters passed to your program on the command line. It allows you to automaticly handle double-quoted strings, support short and long parameter names, validate parameters, generate error messages, display help, specify default... It is as simple as adding a few attributes to a class definition and calling the Parse function.
http://www.getawaymaps.com/downloads/gcstrial.zip - 326Kb - Download - Screenshot

Online Credit Card Verifier
Online Credit Card Numbers Validation with MOD-10. Simply put the credit card number and press the [Validate] button. There are two result variants. [your_card_number] is not a valid card number will appear if the card number isn't valid. If the card number is valid you will get the message... Simple web interface without additional software.
http://www.tm-research.com/online/credit-card-verifier.html - 6Kb - Download - Screenshot

Gastown Delphi Command Line Parser
The Gastown Delphi Command Line Parser easily and reliably handles parameters passed to your program on the command line. It allows you to automaticly handle double-quoted strings, support short and long parameter names, validate parameters, generate error messages, display help, specify default... It is as simple as adding a few attributes to a class definition and calling the Parse function.
http://www.getawaymaps.com/downloads/gbdtrial.zip - 326Kb - Download - Screenshot

SignGen
There is a growing need for the validation of electronic documents, particularly now with legislation processes requiring that many electronically generated documents are now certified and are classified as legally binding correspondence. The need to insert into documents a proof of originator...  SignGen is a fast and simple to use program that will provide the tools to validate and authenticate any document. ...    SignGen also provides a simple Electronic File management system for recording all physical files within your registry and allows documents to be electronically assigned to...
http://www.gjsmith.com/SignGen/SignGen-Demo.exe - 24Kb - Download - Screenshot