The above Tamil fonts whose names start with 'TSCu' are both Tscii and Unicode compliant. i.e. both Tscii and Unicode encoded Tamil texts can be displayed using the same font. To download these free Tamil fonts, please visit http://azhagi.com/freefonts.html
to find links to download these fonts from the internet. In the "free fonts" page, you will find links to download some more free Tscii fonts and free Tamil fonts of other encodings too - like Unicode, Tab, Tam, etc.