* {{en}} [http://www.ethnologue.com/iso639/ ISO 639 and the Ethnologue]
* {{en}} [http://www.prato.linux.it/~lmasetti/seriamente/index.php?sez=materiali&subsect=iso639 Language codes in English and Italian] with Perl scripts for parsing and PHP code
* {{en}} [http://fara.cs.uni-potsdam.de/~georgk/639.xml XML version] of the official ISO 639 HTML data from the [[Library of Congress]]
* {{en}} [http://www.linguasphere.net Linguasphere] — a linguistic research company and press working on the ISO 639-6 project
* {{en}} [http://www.ictmarketing.co.uk ICT Marketing] — in collaboration with Linguasphere and BSI on ISO 639-6 language coding project
* {{en}} [http://www.bsi-global.com British Standards Institute]
* {{en}} [http://www.dicts.info/languages2.php ISO 639 codes and language names in many languages]