Zotero - Zotero is a free, easy-to-use tool to help you collect, organize, cite, and share research.
Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Chatrandom - Chatrandom provides medium to users for having chat at random with different users around the globe.
Weava - Workspace to highlight, organize & collaborate on your research articles.
MeowChat - MeowChat is kind of instant messaging platform that offers the fun and entertaining way to the strangers across the globe to come and interact with the other strangers like them.