With the free availability of Apple's iWork suite, and its robust collaboration tools, you may not need to use Google's suite. But if you're a user of Google Docs, you'll be happy to know that on Wednesday Google released Google Docs (free) for word processing and Google Sheets (free) for doing spreadsheets. Plus, they'll soon be releasing a free Google Slides app for creating presentations. Google Docs and Google Sheets let you create new documents and edit existing documents. They also let you work offline. Whether you're working online or offline, all your changes are immediately saved. In addition to collaboration and sharing features, you can also read and respond to comments from your collaborators. Google Sheets lets you format cells, enter/sort data, perform various sheet operations, and more.