Yac - Take your time back from Zoom & Slack
Bizness Apps - Create your own app or become a reseller and build apps for others
Beseda - Async video and audio messaging for remote teams
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
Slack - A messaging app for teams who see through the Earth!
Dropsource - Mobile development platform for building native iOS & Android apps