List of plugins I usually use to develop sites
Allows you to regenerate your thumbnails after changing the thumbnail sizes.
Simple automated backups of your WordPress-powered website.
Migrates your database by running find & replace on URLs and file paths, handling serialized data, and saving an SQL file.
Edit the permalink of custom post type.
Adds a debug menu to the admin bar that shows query, cache, and other helpful debugging information.
View debugging and performance information on database queries, hooks, conditionals, HTTP requests, redirects and more.
Adds a PHP/MySQL console to the debug bar. Requires the debug bar plugin.
Making sense of the rewrite mess. Display and play with your rewrite rules.