Windows only: Verbum doesn't have an Office-style "Ribbon", but it's not a code-friendly developer's tool, either. It's simply a word processor that supports most formats and seems really usable and friendly, even in its current alpha state.
All the basic text functions are in place in Verbum although Office or OpenOffice veterans may likely find something that's not available, or at least not in the same functionality. But Verbum doesn't aim to be anything more than a light word processor (running about 87MB of memory on my system, but that's light, comparatively).
And if you're into getting just the right look for all your apps, Verbum likely has a skin for you. You can customise the colours and buttons, but the defaults included fit most schemes, with variations on dark, blue, clear and other standards.
Verbum is a free download, although still in alpha, for Windows systems.