Claritex International Pte Ltd
Courses in Tamil Learning
http://www.claritex.com

In fitt
World Tamil Organisation for Information Technology
http://www.infitt.org

Kalvi
Tamil Teaching software
http://www.kalvi.com

Lastech - Software Development
Developing Indoword, Thendral & Multilingual Software Fonts.
http://www.lastech.com

TC Words
English - Tamil Computing Words
http://www.tcwords.com

Thamizhaa
Tamil Software, Codes and stories
http://www.thamizha.com