It doesn't have to be obscure or arthouse, but movies that weren't very popular or just ones you know most people don't go out of their way to see even though they are really good.
I recommend Casa de los Babys which stars Daryl Hannah, Lili Taylor and Maggie Gyllenhaal. It's about American women adopting a baby from Mexico, as well as Mexican-US relations. It's rather depressing at tines, but very good. Another depressing but good film I recommend is The Color of Paradise. It's an Iranian film about a blind boy whose mother is dead and his father lives in the country. The country setting is absolutely beautiful, and the story is rather spiritual, but bleak.
Any other movies that aren't widely-watched that you recommend to people? What is your choice?