Wordpress 4.5 beta 1 is now available download and testing. WordPress is a free open source content management system or blogging platform based on PHP and MySQL. This is still in beta version, so don’t run it on a production site. WordPress Version 4.5 final will be available from April 12, 2016.
New option in customizer to view the look of site in mobile, tablet and desktop.
Now add theme logo within the Customizer.
Inline Link Editing within the visual editor.
Paste a limited syntax of Markdown-like text directly into the visual editor .
Improvements in moderating comments and a preview with rendered formatting.
Now in this version image sizes are generated more efficiently and remove unneeded meta.
New developer features:
Backbone and Underscore updated to latest versions
New WP_Site class