FlashDevelop is an integrated development environment (IDE) for development of Adobe Flash websites, web applications, desktop applications and video games. Developed by flashdevelop
License: Open Source
FlashDevelop is a lightweight, open-source IDE that focuses on speed and customization, making it ideal for developers who prefer a free tool with flexibility. On the other hand, Adobe Flash Builder offers a comprehensive set of features and robust support for professional development, but comes at a higher cost and is more resource-intensive.