Microsoft Office Access - Access is now much more than a way to create desktop databases. It’s an easy-to-use tool for quickly creating browser-based database applications.
Draftbit - Build mobile apps visually with Draftbit's pro-code, no-code platform. Source code included, of course.
LiveCode Platform - It is Both Under the GPL and it is also Proprietary if using the GPL version the software you make...
Android Studio - Android development environment based on IntelliJ IDEA
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Codebots - Codebots is an AI-powered app building tool designed for people who aren’t classically trained in programming.