w.bloggar Offline Blog Editor

I used Zempt 0.3 for a while but this offline editor only supports ASCII. Unicode support is planed for release 0.4 but I want to publish entries in German so the famous ‚Umlauts‘ didn’t work (only as hardcoded HTML). Oliver recommended w.bloggar. I removed Zempt and installed w.bloggar in the localized German version. This tool just works perfect for me. Is there a offline blog editor based on Mozilla ?