Verify the integrity of a WP installation by scanning for unexpected or modified files.
This plugin will scan your plugins (and WordPress) version for more then 3000+ known vulnerabilities and exploits.
This widget will submit your wordpress RSS feed to feedvalidator.org, and check the results to verify your feed is valid.
Analyze the home page of your WordPress site directly from your backoffice and get a quality and performance report.
Validate all post with WCAG standard
bValidator - Form validator for jQuery , bValidator is a jQuery plug-in for client side form validation.
This plugin performs a batch markup validation check over your entire WordPress website.
Validates SBOL 2.0 files and converts SBOL 1.0 to 2.0.
Numbers generator and validator lets you generate, manage and validate numbers on your site.
Este Plugin nos muestra en cualquier lugar que se pueda añadir un Widget de texto los distintivos de validación de W3C Validator.
Simplify page debugging via Facebook Developer Tools, Google's Structured Data Testing Tool, PageSpeed Insights, W3C Validation, and more to come
This is a simple plugin for WordPress to test if the visitors ISP supports DNSSEC. The result is displayd in a widget.
This plugin shows the xhtml and css validity of an entry, in the entry.
CiteKite automatically validates quotations you make of other websites and lets the world know you care.
A plugin with common features missed in WordPress, like favicon, meta tags, adding HTML to head and footer, WordPress e-mail from header filter, etc.