Hardware & software:
- Pixen for Mac at https://pixenapp.com for $10 from Andy Ihnatko.
- Elgato Stream Deck – Live Content Creation Controller with 15 Customizable LCD Keys, Adjustable Stand for $149.99 (Amazon Affiliate Link) from Rosemary Orchard.
- CommandPost at https://commandpost.io for free from Doc Rock.
- Ecamm Live at https://www.ecamm.com for $12/month (and other plans) from Doc Rock.