I've been slightly following IBM's newest version of Symphony recently. It's an Office suite built off of OpenOffice and Eclipse IDE. It's actually pretty nice. I think I like it more than OpenOffice. But I'm not sure if I like it more than MS Office 2007 yet.
The UI of Symphony, much like Office 07 did, has strayed from the class Office UI. It has all the formating options you need for your current document on the right pane. Then it has the more general settings in the top toolbar. Why did they do it this way? Because they have included TABS! Something I have waited for for
YEARS! Not only does it tab all your word documents in one window, but it tabs all your spreadsheets, word documents, and presentations all in one one Window (I'm not sure if I like that or not... we'll see, but it's still cool!).
All I really have to say about these tabs is, IT'S ABOUT STINKING TIME!
And they just finished the beta phase for Linux and started the beta phase for Mac. So there's full releases available for windows/linux users, and I'm sure the Mac beta isn't different, they're just trying to make sure the UI fits with each OS. So it feels natural on the OS your on, and not just like a port.
Oh, and it's completely FREE
Link:
http://symphony.lotus.com/
Screenshot: