Answer:
unsubscribe, unlistr, unroll.me
Explanation:
They are different apps that can be used by a person to unsubscribe from unwanted emails so as to reduce the amount of messages in inbox. Unwanted emails can be unsubscribed manually or with the aid of apps.These apps enables the user to unsubscribe from emails using just a single click. Examples of such apps are unsubscribe, unlistr, unroll.me and many more other apps.
