One song per post please and if possible why you like it (personal, analytical etc.). Please include raga, tala and composer info if you have it, and info on where people can listen to it - but watch out for commercial recording abuse!
PS: I am still making my list (for A), after which I will narrow down my choice

Here is a (probably not fully comprehensive) listing of the krithis by Trinity (and others) which can be used to jog your memory:
Thyagaraja: http://www.geocities.com/vienna/strasse ... garajk.htm
Dikhsitar: http://www.geocities.com/vienna/strasse ... shitar.htm
Syama Sastry: http://www.geocities.com/Vienna/Strasse/5926/shyama.htm
Papanasam Sivan: http://www.geocities.com/athens/acropolis/1428/
Patnam: http://musicinfoguide.blogspot.com/2007 ... -1902.html