Adobe Brackets Test Drive - Modern and Open Source Editor for Web

With focused visual tools and preprocessor support, Brackets is a modern text editor that makes it easy to design in the browser. Try Creative Cloud Extract (preview) for Brackets for an easy way to get clean, minimal CSS straight from a PSD with no generated code. Support HTML, CSS, JavaScript; also available
Preprocessor Support, Live Preview, Inline Editors.

My personal impressions: very good autocomplete(for all PL) and visual tools, a lot of plugins.