Some nice things about Carnatic Music which I thought I should share. Sangeetha Sampradaya Pradarshini (the link allows one to download the whole book for free) is one of the most important theoretical books about Carnatic Music. It was authored by Sri Subbarama Dikshitar

Sangeetha Priya is a nice website that contains a lot of Audio content of Carnatic Music that can be downloaded for free.