xml validator

Web PAD XML information extractor tool saves retrieved data in .CSV file easily

Perl XML Library

Java XML Library

Check HTML, CSS, SEO, PHP, JavaScript, accessibility, or links.

This is a script for ruby.

check email addresses from email lists, determine if the emails are valid.

Powerful tool for checking mailing lists for invalid/non-existent addresses

Validates every e-mail address from a mailing list providing high speed verifica

MD5ArchiveValidator (MD5AV) is a utility to confirm the accurate storage of file

This Applet will help you interconvert, tidy up, and validate ISBN-10.