Microsoft OneNote users have long known that this program is one of Microsoft's best kept secrets--a note-taking, web clipping, brainstorming gem of a tool hidden in Microsoft Office. The biggest detractor for OneNote was its lack of cross-platform compatibility--no Mac OS X support--and other features like forwarding web pages via email that competing services like Evernote and Springpad have. Now, OneNote is available for Mac users, and for free.
This is pretty huge, since OneNote has been around since 2003, but only on Windows. It's one of my favorite programs because it is essentially a digital notebook--and a far more natural one to use than even Evernote and Springpad. It seems like Microsoft is upping its game to finally compete with these other note-taking apps.
As ZDNet's Mary Jo Foley reports, the free version of OneNote lacks a few features you'd get from the full desktop version: SharePoint support, Outlook integration, and version history. You're also only supposed to use it for home or student/school (non-commercial) reasons.
Folks who have downloaded the Mac version of OneNote complain you can only save files to Microsoft OneDrive (formerly SkyDrive), but I think that's a small price to pay for a program we've been waiting over a decade for.