Microsoft’s OneNote has climbed to the top of the Free apps on Mac app store soon after its launch. OneNote is available for Windows, Mac,iPad, iPhone, Android & Web. OneNote, is your very own digital notebook. On Mac it is compatible with OS X 10.9 or later. This is a free program for home/school use & businesses need to purchase the license. There are other Microsoft apps in the top 10 position like onedrive & others. It has got hundreds of reviews & can be downloaed from the mac app store.