IDN homograph attack - Wikipedia
IDN Forums
IDN World Report – Official World Report on Internationalised Domain Names
That apple.com link you clicked on? Yeah, it's actually Russian • The Register
Chrome and Firefox Phishing Attack Uses Domains Identical to Known Safe Sites
ChopChop.Domains Blog - ChopChop Domains Blog
Punycoder - the IDN / Punycode converter
Verisign IDN Conversion Tool To Convert Internationalized Domain Name Into Punycode - Verisign
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PunyCoder - the punycode converter
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IANA - IDN Repository Procedures
IDN ccTLD Fast Track String Evaluation Completion | ICANN
About Arabic Domain names
Arabic IDN - Internationalized Domain Name in Arabic - Register Arabic Domains - IDNs in Arabic Language
IDN Backgrounder | Afilias
IDN FAQ Page - EnCirca
How to Get Started with IDNs – 14 Tips, Techniques and Resources
How right-to-left domain names work in practice | Domain Name Wire
E-mail test - IDNwiki
IDNwiki - IDNwiki
Verisign IDN Conversion Tool