Preserved HTML Editor Markup

Does a lot of things. From preserving whitespace, to multi-line HTML comments, and to HTML 5 support, the plugin enhances the default text editor to allow developers to render content according to their rules and not the WP team's rules.

Installation:

Unpack and upload it to the /wp-content/plugins/ directory.
Activate the plugin through the 'Plugins' menu in WordPress.

Features:

• Better whitespace controls
• Multi-line HTML comments
• Format drop-down TinyMCE fix
• Use BR tags OR P tags for newlines
• Select which one of the aforementioned to use in posts and pages
• "Fixit" feature to affect previously created content
• Support for HTML5 block anchor tags

What is new in this release:

• Removed 'show_ui' filter for fix custom post type buttons.

What is new in version 1.4:

• Removed 'show_ui' filter for fix custom post type buttons.

What is new in version 1.3:

• Added support for inline JavaScript and CSS, as long as the wptexturize and convert_chars filters are disabled.
• Added cache-buster for this plugin's JavaScript includes to prevent upgrade issues seen in version 1.2.

Requirements:

• WordPress 3.2.1 or higher