data:
URL testcases
testcase 01
UTF-8
testcase 02
BASE64
testcase 03
UTF-7
testcase 04
UTF-16 in BASE64/UTF-7/UTF-8 mixture
testcase 05
UTF-16 in BASE64
testcase 06
UTF-7 in BASE64
testcase 07
obfuscated UTF-7 in BASE64
testcase 08
UTF-7 in BASE64 via IFRAME (that's where the onload alert came form)
Other cool stuff
LockЯ
PHP charset encoder
PHP Unicode Generator
PHPIDS Smoketest
data: URL testcases