The "Open Flash Library" for fast 2D development
A foundational Haxe framework for cross-platform development
Support for iOS GameCenter
Provides SVG parsing and rendering
Open source version of the Scratch 2.0 project editor. This is the basis for the online and offline versions of Scratch found on the website.
Actuate is a flexible, fast "tween" library
Android Support V4 extension for OpenFL / NME (provides android-support-v4.jar for other extensions)
Support for In-App Purchase
OpenFL extension to use Facebook in your app
Box2D is a popular rigid-body 2D physics engine
Work-in-progress OpenFL documentation
OpenFL extension for "Google AdMob" on iOS and Android.
Custom plugin for Flash CC
WebView Extension for OpenFL