Haxe is a high-level, cross-platform, multi-paradigm programming language and compiler that can produce applications and source code, for many different computing platforms, from one code-base. Developed by Haxe Foundation
License: Open Source
Hack is an extension of PHP designed to provide better performance and type safety, primarily for web applications, while Haxe is a versatile language aimed at multi-platform development, particularly in games and applications. Hack's strengths lie in its strong typing and integration with PHP, while Haxe excels in its cross-platform capabilities and wide range of targets.