The Year of Livestreaming - A 2016 live video retrospective from Livestream

Fantastical 2 - Fantastical, the Mac calendar app you'll enjoy using. Quickly create new events with natural language input and more.

Lightstream - Powerful, cloud-based live streaming studio.

Google Calendar - Spend less time managing your day & more time enjoying it

Brime - Brime is a new live streaming platform that supports 4K 120 FPS streaming, low latency, live chat translation, and has built-in multi streaming.

Itsycal - Itsycal for Mac. Itsycal is a tiny menu bar calendar. If you want, it will display your events as a companion to the Mac Calendar app. You can also create and delete (but not edit) events. Download Itsycal for macOS 10.