If you did not know already, Sangeethapriya has a new website dedicated to Tyagaraja. Check it out!
You can listen to 393 of his ~700 kritis! I am sure many more will be added soon.
Jai Sangeethapriya 🙂 and every one who has made this possible.
p.s: As of January 6th 2010, audio for 665 compositions is available.