This SEO plugin checks the content of posts/pages for the keyword density (single/phrases) while writing and is automatically setting the META-tags.
This SEO-Tool provides a keyword analyzer calculating the keyword density of the page/post content and generating statistics for keywords and phrases.
Manage adaptive (mobile-ready) images and automatically apply them as backgrounds. Pull beautiful photos from Unsplash or supply your own images.
GhostBloggers Keyword Density Checker returns a nice overview of your global top used keywords, their density and lists a number of relevant art