1.Outlook, Microsoft mail (Hotmail)
You could say that the main providers of personal mail are Gmail (Google), Outlook / Hotmail (Microsoft) and Yahoo. Therefore, Microsoft Outlook could not fail as one of the most downloaded Microsoft applications. A mail manager with all the functions you can ask for, including different inboxes, multi-account and calendar. At the height of Gmail.
2.Word, PowerPoint and Excel, the 3 Office riders
Do you need an explanation? Word, PowerPoint and Excel, as much as free software tries, remain on top of the office in their fields. The most well-known services of writing, presentations and spreadsheets, also on Android. Also, if it was not enough, its use is free.
the best to take notesOneNote is the application that helps me the most with my studies. My notebook is a tablet and OneNote is to blame for it. It contains everything you need to act as a notebook , from handwriting to importing PDFs that you can underline. In mobile it also serves to take audio notes (even in Android Wear) and write notes.
the Microsoft and Windows cloudThere are many storage applications in the cloud such as Google Drive, Dropbox or OneDrive, from Microsoft. The latter has a point in its favor and is that it comes integrated in Windows. Since it is the most used operating system on computers it is an easy way for many to pass files between computers in a simple manner. Also to store in the cloud and have it accessible on the computer and mobile.