This site lists many films to be viewed free. This is youtube site, so I suppose there should not be any problem also. Just click on this link and choose whichever movie you want to watch...

http://www.youtube.com/movies/indian-cinema?fl=f&l=hi&pt=g&st=f

This is another site where one can watch more than 1,000 movies

http://moovizon.com/