mondalaci

Have you ever tried to validate a WordPress page that is full of Flash content and experienced some major pain throughout the process? If so, then this plugin is just for you!
Ultimate Flash XMTMLizer turns Flash embed code into well-formed XHTML by escaping object tags on the server side and unescaping them on the client side using JavaScript.

Ultimate Flash XHTMLizer

Turns Flash embed code into well-formed XHTML by escaping object tags on the server side and unescaping them on the client side using JavaScript.

Nikoya

Check the doctype validity using W3c validator (html , xhtml , … ) when creating or updating page / post / custom post type and show the result in backend 
It show the result in back-end in sortable column, a link is add to the w3c for all file to help you to correct html error.
Very easy to see if a post / page is valid or not.
This plugin can check the W3C validity of your page / post or custom post type even if the site is not accessible from the Internet (if you work on local system for example)

(x)html easy validator

Check the doctype validity using W3c validator (html , xhtml , ... ) when creating or updating  page / post / custom post type and show the result in  …

Ultimate Flash XHTMLizer vs (x)html easy validator