https://wordpress.org/plugins/
http://codex.wordpress.org/Function_Reference
https://developer.wordpress.org/reference/
wp-themes
http://www.freewordpressthemes4u.com/
http://digitalnature.ro/projects/fusion/
wp-plugins
http://lesterchan.net/wordpress/category/plugins/
WordPress Plugins Used On The Michel Fortin Blog
wp-functions , classes