Hacker News Reader

Markus Kuhn's web page has a lot of useful UTF-8 info and valuable links (e.g. samples of UTF-8 corner cases that people often miss).

This is a great resource; it was extremely useful when I was writing a UTF-8 library myself. I found the UTF-8 stress test file is particularly useful to run tests against: http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt

Hmm, TextMate has problems with "5.2 Paired UTF-16 surrogates" in that stress test file.

(Yes, I interpreted the file as UTF-8 in TextMate).