Joomla: we can work with components, modules, plugins and create templates (W3C validate, Tableles (customise and create new module with MVC structure), templates (W3C validate, Tableless, SEO)s, SEO)
Magento: Extensions, templates (W3C validate, Tableless, SEO)
Wordpress: we can work with plugins and create templates (W3C validate, Tableless, SEO) Drupal: Modules and templates (W3C validate, Tableless, SEO)
Virtuemart: we can work with plugins and create templates (W3C validate, Tableless, SEO) Drupal: Modules and templates (W3C validate, Tableless, SEO)