TamilNadu being one of the major state in South India has a big history on the political parties. Initially, when India got the Independence there was only one party that is Congress, today there are so many parties as many as a mosquitos in a house.
Congress : Initially this was the only political party after Independence.
DK ( Dravinda kazhagam) : This was started by E.V. Ramaswamy. He was initially part of the congress. He had secular thoughts and the people in TamilNadu congress did not have the same thoughts even though the central congress has the same thought. He came out of congress and started this party.
DMK (Dravida Munnetra Kazhagam) : Annadurai, who was part of the DK started this party since his thought did not match E.V. Ramaswamy. One of the top part of today. After Annadurai, this is being head by Karunanidhi. ( I am sure this will break again in near future)
ADMK (Anna Dravida Munnetra Kazhagam) : This was started by M.G.Ramachandran( M.G.R). He was initially part of the DMK. After Annadurai died, M.G.R & Karunanidhi did not get along. He came out of the party and started this new party. Now this is being headed by J.Jayalalitha.
MDMK ( Marumlarchi Dravida Munnetra Kazhagam): Started by Gopalaswamy. He was initially part of the DMK. He did not get along with Karunanidhi. So he came out and started this party.
DMDK (Desiya Murpokku Dravida Kazhagam) : DMDK is a regional political party formed by Tamil film actor Vijayakanth in the Indian state of Tamil Nadu along the lines of the regional Dravidian political parties. He formally announced party formation on September 14, 2005 at Madurai. He was initially part of the DMK. He did not get along with Karunanidhi. So he came out and started this party.
AISMK (Akila Indiya Samathuva Makkal Katchi) : Started by Tamil film actor Sharath Kumar. I too was part of DMK before.
PMK (Pattali Makkal Katchi) : Started by Dr. S. Ramdoss in 1980. This was the only party that is not a child of the DK parties.
There are some of the prominent parties in Tamil Nadu. Still there are some small parties of which i do not know the names. Even though these are some parties that could be named. They all have the same goal. You know what is it.