Thunkable - Powerful but easy to use, drag-and-drop mobile app builder.
Tradify - Tradify is a Job Management software for the trade contractor it can track every job from quote to invoice, helps to stay on top of workflow by tracking the jobs and team at all times.
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.
FinancialForce HCM - FinancialForce.com provides cloud back-office applications for Salesforce CRM.
Bubble.io - Building tech is slow and expensive. Bubble is the most powerful no-code platform for creating digital products.
Fergus - Job management software for plumbers & electricians