  Number of IoT enabled devices are being tried and introduced every year and
there is a healthy competition among researched and businesses to capitalize
the space created by IoT, as these devices have a great market potential.
Depending on the type of task involved and sensitive nature of data that the
device handles, various IoT architectures, communication protocols and
components are chosen and their performance is evaluated. This paper reviews
such IoT enabled devices based on their architecture, communication protocols
and functions in few key socially relevant fields like health care, farming,
firefighting, women/individual safety/call for help/harm alert, home
surveillance and mapping as these fields involve majority of the general
public. It can be seen, to one's amazement, that already significant number of
devices are being reported on these fields and their performance is promising.
This paper also outlines the challenges involved in each of these fields that
require solutions to make these devices reliable
