Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Yac - Take your time back from Zoom & Slack
MIT App Inventor - App Inventor is a cloud-based tool, which means you can create apps for phones or tablets right in your web browser.
Beseda - Async video and audio messaging for remote teams
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
Slack - A messaging app for teams who see through the Earth!