Contrary to many "free font" aggregate sites, It is a proprietary typeface originally distributed by Dass Studios (a prominent design agency in Tamil Nadu). Like high-end English fonts such as Helvetica or Gotham, purchasing a license is required for legal commercial use.
If you cannot find the original, these free Tamil fonts offer similar readability:
Contrary to many "free font" aggregate sites, It is a proprietary typeface originally distributed by Dass Studios (a prominent design agency in Tamil Nadu). Like high-end English fonts such as Helvetica or Gotham, purchasing a license is required for legal commercial use.
If you cannot find the original, these free Tamil fonts offer similar readability: dass anand tamil font download free