Microsoft finally announced a version of its Office productivity suite for the iPad today, and it's a solid, functional set of apps. As we say in our review, "Office for iPad is elegantly designed, with a robust feature set and intuitive layout." And it's free, as long as you're only interested in reading or viewing docs, that is. Want to edit that spreadsheet, or create your own PowerPoint deck? You'll need an Office 365 subscription, starting at about $10 a month. That may seem steep compared to the price of some other iPad productivity apps, like Apple's iWork suite, which is free for some iPad users. But that price includes the full desktop versions of the Office suite, which you can install on up to five computers.