Compiler based completion, refactoring, projects templates

It's extremely fast and lightweight

FlashDevelop's code completion is pretty good.

Although the code generation can not be really called top-notch, it's decent and sufficient for most developers.

While it's project template system is not the best compared to it's competitors, it still is decent and is a good way to generate some boilerplate code.

FlashDevelop has first-class support for Haxe development, the open source toolkit based on a modern programming language and cross-platform library.