There are a number of plugins for WordPress Developers that I consider to be must-have for any local development environment. These include:
- Theme Check
- Log Deprecated Notices
- RTL Tester
- Debogger
- Theme Unit Test even though is is technically import data
Each of these serves a unique purpose when working on themes and plugins especially if you care about localization and using the latest version of the WordPress API.
The downside is that it can be somewhat of a pain to install these each time you setup a new development environment (depending on how you actually setup your local machine).
But thanks to the guys over at WordPress VIP, this process for getting up and running with the necessary suite of plugins for WordPress developers is much easier.