Firefox Quick Locale Switcher
After listening to This Week in Django Episodes 19 and 20 which discussed Internationalisation and Localisation, I've realised how important it is to make applications work in languages other than English. I've begun implementing i18n hooks in some applications, and started the somewhat laborious process of testing. This Firefox addon lets you easily switch locales in FireFox, allowing for easier testing of Django's i18n/l10n functionality.
https://addons.update.mozilla.org/en-US/firefox/addon/1333