While the Sunsuraj font is legendary, it has limitations. It was originally designed for non-Unicode (TSCII or TAB) encoding. Many modern systems now use (e.g., Bamini, Latha, Nirmala UI).

The most popular choice. It supports various encoding styles.

You can find SunSuraj font bundles on various Tamil resource websites. Look for "Sun-Tamil" or "Suraj-Tamil" zip files. Search for a trusted repository of Tamil legacy fonts. Download the .zip file containing the SunSuraj collection.