Callpage - Turn website visitors into sales calls. Use CallPage and provide immediate free phone callback to your leads in 28 seconds.
Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Kit CRM - A CRM for your Facebook page
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.
Closer - Digitize your sales team | Video calls for sales
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.