Yama is the Hindu God of Death - Mrityu. But unlike other cultures, religions etc. it is interesting that he has precious little in the overall mind-scape of a religious Hindu. The apathy is intriguing. He is not worshiped, which may be understood at some level. But he is not even feared or dreaded - unlike other cultures where Death has a great deal to do with the doctrine of fear or retribution. Yama is not an object of terror. Now how is that?
There are hardly any temples of Yama - except a few in South India. At least you don't find one in the famous teerthas or clusters of temples. There are no specific rituals, or pujas assigned to him. Apart from Vata-Savitri that is usually followed in Maharashtra and South India, Yama does not come in the top-of-mind recall in terms of deities.
And all this, in spite of his prominent role in the epic Mahabharata. Not only is the main protagonist - Yudhishthira Dharmaraja - Yama's son, there is also the…