From TipMonkies:
ThinkFree offers a desktop office suite which is Office compatible. ThinkFree Office Online offers three products, which basically translate to Word, Excel, and PowerPoint. Like other similar web services, each application offers a similar interface to its desktop counterparts and they work great. All files are stored online on ThinkFree’s servers, but you can easily download your documents in Office format (.doc, .xls, and .ppt respectively). The basic account is free and offers 30MB of storage space. Be sure to have Java installed on your computer for the applications to work.