Microsoft Office for Mac is powered by the cloud so you can access your documents anytime, anywhere, and on any device. It's unmistakably Office - but thoughtfully designed to take advantage of the unique features of the Windows. Microsoft Office is an office suite of desktop applications, servers and services for the Microsoft Windows and Mac OS X operating systems, introduced by Microsoft. The new Microsoft Office for macOS includes updated versions of Word, Excel, PowerPoint, OneNote and Outlook-and the moment you open any one of the apps, you'll immediately feel the difference. A refreshed task pane interface makes positioning, resizing, or rotating graphics easy so you can create exactly the layout you want. And new themes and styles help you pull it all together to produce stunning, professional documents.
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Word for Mac
Create, polish, and share beautiful and professional documents. The state-of-the-art authoring and reviewing tools in Word make the creation of polished documents easy. The new Insights pane shows relevant contextual information from the web inside Word. The Design tab enables you to manage layout, colors, and fonts across a document.
Get more done by working together using built-in tools to share and review documents. Several people can work on the same document simultaneously and use threaded comments to have a conversation right next to relevant text.
Excel for Mac
Analyze and visualize numbers in new and intuitive ways. The new Excel for Mac enables you to turn numbers into insights. Familiar keyboard shortcuts and data entry enhancements like formula builder and autocomplete immediately make you more productive. Excel also helps you visualize your data by recommending charts best suited for your numbers, and letting you quickly preview the different options. New PivotTable Slicers help you discover patterns in large volumes of data.
PowerPoint for Mac
Create multimedia presentations and present your ideas with confidence. Walk into your next presentation with complete confidence. The new Presenter View in PowerPoint displays the current slide, next slide, speaker notes, and a timer on your Mac, while projecting only the presentation to your audience on the big screen. A new Animation pane helps you design and fine-tune animations, and refined slide transitions ensure the finished product is polished. Easily share your presentation and invite others to work on the same presentation simultaneously.
OneNote for Mac
Harness your thoughts in your very own digital notebook. Capture, organize and share your ideas with digital notebooks that you can access on any device. Find things quickly with a powerful search engine that tracks your tags, indexes your typed notes, and recognizes text in images and handwritten notes. Bold, italicize, underline, highlight, insert files, pictures and tables—format your notes like you want. Easily share notebooks with friends, family, or colleagues so everyone can work together on travel plans, household tasks, or work projects.
Outlook for Mac
Stay organized with an email and calendar experience that's fast and looks great. Managing your email, calendar, contacts, and tasks has never been easier. The new Outlook for Mac has push mail support so your inbox is always up to date. The improved conversation view automatically organizes your inbox around threaded conversations, so you'll never hunt for related messages again. And the new message preview gives you the first sentence of an email just below the subject line, so you can quickly decide if you want to read it now or come back later.
Note: Limitations in the unregistered version, you get to open documents but you cannot edit them or create new ones.
Also Available: Download Microsoft Office for Windows

Apache OpenOffice is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.
OpenOffice is the result of over twenty years' software engineering. Designed from the start as a single piece of software, it has a consistency other products cannot match. A completely open development process means that anyone can report bugs, request new features, or enhance the software. The result: the office does everything you want your office software to do, the way you want it to.
Apache OpenOffice is easy to learn, and if you're already using another office software package, you'll take to the software straight away. The world-wide native-language community means that the program is probably available and supported in your own language. And if you already have files from another office package - this tool will probably read them with no difficulty. Best of all, Apache Office can be downloaded and used entirely free of any license fees. Download it now, and get:
Product
Compatible with other major office suites, Open Office is free to download, use, and distribute.
Writer
A word processor you can use for anything from writing a quick letter to producing an entire book.
Calc
A powerful spreadsheet with all the tools you need to calculate, analyze, and present your data in numerical reports or sizzling graphics.
Impress
The fastest, most powerful way to create effective multimedia presentations.
Draw
Lets you produce everything from simple diagrams to dynamic 3D illustrations.
Base
Lets you manipulate databases seamlessly. Create and modify tables, forms, queries, and reports, all from within OpenOffice.org
Math
Lets you create mathematical equations with a graphic user interface or by directly typing your formulas into the equation editor.
Note: Requires Java Runtime Environment.
Also Available: Download OpenOffice for Mac and Apache OpenOffice Portable