Evernote

   Evernote is an indispensable tool. Its has flexibility you use Evernote for practically anything, from recording meetings, marking up PDFs, notes, reciepes and keeping a daily diary. Evernote is a reliable for practically every platform. Work Chat feature adds instant messaging capabilities to Evernote making it more powerful for collaboration. Evernote has an excellent search tool lets you find anything you've uploaded to your account. Geo-tags, manually added tags, notebooks, for organizing notes.
    Evernote has apps for Windows, Mac, iOS, Android, Blackberry and Windows Phone, in addition to its Web app. When it comes to taking notes and getting work done Evernote is the answer.