Subscribe – http://slocumstudio.com/subscribe
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Coding Standards – http://codex.wordpress.org/WordPress_Coding_Standards
Readme.txt Generator – http://sudarmuthu.com/wordpress/wp-readme
Matt and Scott continue their discussion of plugin development with a look at the plugin header as well as the proper development of a good readme.txt file.
Also, should you develop your plugin for the WordPress plugin repository? Find out the positives and negatives of submitting your plugin into the repo.