From the Url namespace

• url_action - Generates a fully qualified URL to an action method.
• url_content - Converts a virtual (relative) path to an application absolute path and renders the result.
• url_encode - Encodes text so it is usable in a URL.

• html_antiforgerytoken - Generates a hidden form field (anti-forgery token) that is validated when the form is submitted.
• html_renderaction - Invokes the child action method using the specified parameters and renders the result inline in the parent view.

• styles_render - Renders a link-tag to a stylesheet bundle
• scripts_render - Renders a script-tag to a javascript bundle

Reference