In Appendix B of .NET Internationalization I provide a number of information resources for the internationalization world. The world is always changing and I keep a list of updates here. Normally I just add new items to this list without any mention but I came across one site recently that I felt deserved a mention: http://www.kwintessential.co.uk. Kwintessential provide language and cultural services so naturally the site is driving towards using their services. That said there are still a number of free resources on the site that are worth a look:-

Country Profiles:-
http://www.kwintessential.co.uk/resources/country-profiles.html

Free online translator:-
http://www.kwintessential.co.uk/translation/free/online-language-translation.php

Online Test: How Culturally Aware Are you ?
http://www.kwintessential.co.uk/resources/culture-tests.html

The Country Profiles are interesting as they delve into etiquette and local customs. The Online Test tests your cultural knowledge and is equally fascinating - I’m not aware of any other such free test available online.