1) Yaar:
The movie was a hit, making the director add the movie's name before his name as 'Yaar' Kannan. It was a well-crafted movie, with a decent star cast of Arjun, Nalini, Jaishankar, Senthil, 'NizhalgaL' Ravi, (I think his was the first name the horror moviemaker would pen when deciding the star cast.. One can see him in pretty much all the movies... He would have just missed being called 'Pei' Ravi, ;) )among others. Even the comedy segment, involving was Senthil was quite freaky, especially the demise of Prof. Senthil. One unforgettable scene which scared the hell out of me is where Jayachitra encounters her 'different' son, thinking of which I still get the hair at the back of the neck raising.
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There is the same spookiness in this movie too, with lots of boorish moments. It followed the same trend of people in a house dying one after the other.
3) My dear Lisa:
It has the classical horror motive of revenge behind it. Some of the modus operandi for murder is inspired from 'Evil dead'.
4) Idhudhan arambam:
Produced and directed by 'Raj Bharath' of early 80's movie 'Uchakkattam', this involved a lot of scary scenes, but this was a movie with a twist in the end.
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Heavily inspired from 'The Oman', this movie, produed by 'ThakkAli' Srinivasan had a child as the '666' evil. The climax was quite heart-breaking and made me think about what would have happened after the movie ended.
6) Vaa Arugil Vaa:
Actually a nice movie. It had a decent storyline, heart-wrenching senti scenes, good suspense-building moments, and an entertaining second half. The horrifying figure was inspired the 'Chucky' character, but the Tamil version was quite cute. This movie, along with 'Yaar' and 'Idhudhan arambam' is one of the only three Tamil horror movies that I have watched twice.
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A movie with 'Mike' Mohan as the main character, but a unique one.. His voice and hairstyle were horrible; and the horror-inducing scenes were quite creepy. For those of us who associate Mike Mohan with soft, romantic roles, and singing in front of mikes, this movie is undigestible.
8) Shock:
Remake of Hindi 'Bhoot', this film scared only in parts. The most scariest creature was the hair-chewing, eye-rolling Kalairaani, who for your kind information, was not possessed. It was quite different from the usual horror movies in the sense that it is based in an urban setting, a Chennai apartment.
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A recent one; again based in an urban setting of college, library and normal city house. Despite having the advantage of using good technology, it wasnt that different in the fear-inducing scenes. It has got some twists too; the last scene/frame of the movie is quite shocking.
BTW, one doubt: Why do Indian women close their mouths with their hands when they scream? ;)