Discourse
It's an Internal Discussion Forum of IITH where you can find multiple categories such as Institute Seminars, carpooling, marketplace, lost and found, Science and Technology, Programming, Academics, Institute Discussion, Tech Tips, etc. All of you are strongly encouraged to switch over to this platform rather than relying on the age-old emailing platform for making announcements to all.
https://discourse.iith.ac.in/top?period=yearly