iWork for iCloud is a free tool that lets you access Pages,Keynote, and Numbers over the web. Apple has given a major update to the suite today, adding new features, as well as updating existing ones. The app now allows up to 100 people to collaborate on a single document in real time. The previous limit was 50.
Also, you can now edit documents of up to 1GB in size and add images up to 10MB in size in these documents. You can also format charts on all three apps that can be 2D or interactive. Other changes include inserting and editing in line tables in Pages, showing and hiding slide numbers in Keynote, alternating row colors in tables in Numbers, chart formatting and new color options. You can also export Pages documents to ePub and Numbers documents to CSV.
To access iWork, just visit iCloud website with a valid Apple ID from any browser, or through iWork app on Mac OS X and iOS. Perhaps with the update, Apple is looking to lure users from Google Docs and Microsoft Office, with the latter becoming available on iPads only recently.