Angsuman has done a fantastic job of putting together this list.
Very useful and highly recommended for all Plugin and Theme Developers.
View the list …
Ajay is an investment banker by profession and a die-hard blogger by passion. He is the owner and chief editor of Techtites. In his free time, he also blogs at AjayDSouza.com, authors a few WordPress plugins and operates Sir Arthur Conan Doyle