OBS Studio - Free and open source software for video recording and live streaming for Mac, Windows and Linux.
Public - Group chats.
Snagit - Screen Capture Software for Windows and Mac
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Chalk - Chalk is a calculator that tries to do right what others do wrong.