Office Like Suites

ThinkFree
Java based word processor, spreadsheet and presentation package that offers Microsoft Office compatibility
Google Docs
Easy to use online word processor , spreadsheet and presentation editor that enables real time document sharing and collaboration
Office Web Apps on SkyDrive
A companion  to the desktop-based Office, not a replacement for it. Site also gives you  25 gig of online space to store documents. The Web Apps have far fewer features available on the ribbon—or anywhere else—than the desktop-based apps. For example, in the Word Web App, you can insert and resize images, but you can’t drag them around the page.
Zoho Online
A suite of  20 online applications that include the Collaboration, Business and Productivity apps. Has a database web app that no other online site offers.
Acrobat.com
A suite of applications from Adobe that allow users to create, collaborate on and share documents. The special feature of this site is the ability to hold online meeting with others (web conferencing) using Connect Now.