The World Atlas of Language Structures Online

[HansV]

Rather specialized, but fascinating if you're interested in languages: The World Atlas of Language Structures Online.

"The data and the texts from The World Atlas of Language Structures, published as a book with CD-ROM in 2005 by Oxford University Press, are now freely available online."

You can read the text, and view maps (you can customize them to some extent; uses Google Maps). For example, this maps shows where the word for "tea" in different languages comes from:

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[IanWilson]

Interestingly (at least I think it's interesting) "char" is British English slang for "tea".

Ian

[StuartR]

Interestingly (at least I think it's interesting) "char" is British English slang for "tea".

Ian

I think that comes from the days of the Raj. Empire isn't what it used to be.

[wasbit]

Interestingly (at least I think it's interesting) "char" is British English slang for "tea".

Ian

Nah, it's the woman who comes in to do the cleaning or a fish.