free web-based office suites

• Google Docs is a free, Web-based word processor, spreadsheet, presentation, form, and data storage service offered by Google. It allows users to create and edit documents online while collaborating in real-time with other users.

• Zoho Office Suite is a Web- based online office suite containing word processing,   spreadsheets, presentations, databases, note-taking, wikis, CRM, project management, invoicing and other applications developed by ZOHO Corporation.

• ThinkFree Office includes a word processor (Write), a spreadsheet (Calc), a presentation program (Show), and a WYSIWYG HTML and blog editor (Note). ThinkFree Office reads and writes to Microsoft Office file formats (.doc, .xls, and .ppt). ThinkFree Office has a look and feel similar to the prevalent Microsoft Word, Excel and PowerPoint, providing a degree of familiarity to users of those applications.

• Contact Office is a web application accessible with a html browser (browser), developed by ContactOffice Group. It is a virtual office consisting of a set of interrelated tools (webmail, calendar, document storage, tasks, notes, bookmarks, etc.). 

• Share Office is an online office suite built on top of the open standards known as OpenSAM (short for "open simple AJAX mashup"). The application incorporates, through partnership, a word processor from iNetOffice, a spreadsheet from EditGrid, and a presentation application from Preezo.