calliko

Validation Plugin comments. The plugin is based on js-script jquery.validate. 
The plugin does not require any settings and works automatically for standard WordPress comments, of course, if you have a standard theme.

comment validation

Хороший простой плагин, работает из коробки ровно так, как ты и ожидаешь. 

Работает как ты ожидаешь

Validation Plugin comments. The plugin is based on js-script jquery.validate.

Allan Collins

Is your website up to W3C HTML coding standards? This plugin will allow you to test each page or post on your site against the W3C Validator.
Want to contribute? Fork it: https://github.com/allan23/validated

Validated

This plugin will allow you to check your pages/posts HTML against the W3C Validator.

comment validation vs Validated