IsaiDub.com is a website that essentially posts Tamil movies for everyone. Anyone can download 640p, 480p high-resolution movies. IsaiDubb.net and Isaidubb.com are some of their domain names.
You can access a number of movies that are dubbed in Tamil. Several of the original languages of the movies are in English. But these English movies are dubbed Tamil for a greater interpretation of the local language.
The website shows some specifics of the film, including a banner, movie ranking, release date, quality of the video, genres, etc.
You can also watch a sample movie clip to check the quality of the movie you're downloading. This can be very useful to a lot of people who only need to check the quality of the film before they download the movie to their computer.