I would like to refer an organization which I had first had experience when I was in India and later during my visits:

Udavum Karangal (Helping Hands) is a registered, non-governmental, non-religious and non-profit social service organization, established in 1983, with the sole objective of serving people in need.

More about the organization and how we can support can be found at "http://www.udavumkarangal.org/index.php"