scriptcs - scriptcs makes it easy to write and execute C# with a simple text editor.
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.
Ecere SDK - A cross-platform Software Development Kit including a GUI toolkit, a 2D/3D graphics engine, a...
LiveCode Platform - It is Both Under the GPL and it is also Proprietary if using the GPL version the software you make...
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.