Making internationalization/localization in WordPress faster than ever before.
Choose languages for displaying WordPress in, in order of preference.
Add a Language Switcher to Menus, Post Types and Taxonomies.
This plugin gives better transliteration of non-ASCII characters in slugs.
WPT Custom Mo File is a powerful translation plugin that helps you use your own translation .mo files. Simple as that.
Translation tools for your WordPress install.
This plugin allows you to order human translations for your pages and posts using Supertexts professional translation services.