WordPress To-Do List Plugin – Integrates a multi-featured to-do list into the WordPress administration area. Manage to-do list items on a individual or group basis with customizable settings.

WordPress Widget CSS Classes Plugin – Widget CSS Classes gives you the ability to add custom classes and ids to your WordPress widgets.

WordPress Post Planner Plugin – A premium plugin that is a complete editorial solution that makes managing a multi-author blog easier (also useful for single-author blogs).