Previously, Chat Room is using WebEx. However, now WebEx is being replaced by Zoom. For more information, please go to the site: What is Web Conferencing?.
Alternatively, you may use NUS TeamUp.
TeamUp allows you to create teams with whom you can chat, exchange links and files. This can be done via the web, mobile or desktop apps. Unlike other chat apps, you need not share your phone numbers to use it. Also, replies to messages can be threaded so that communication is kept in context.
In TeamUp, you can group chat with everyone in a team. For large teams, you can set up smaller private groups. Like most messaging service, you can also direct message other members in your team. This service is open to staff and students. TeamUp can be used for modules, projects or any other situation where group communication is needed.