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Create and edit documents, create a spreadsheet or just create a great presentation online with these free online tools.

Google docs

First of all lets talk about Google docs. Not that I am saying that it’s the best of its kind, but just because it’s from Google! Still in beta, Google Docs lets you create documents, spreadsheets and presentations online free with features including making bulleted lists, sorting by columns, adding tables, images, comments, formulas, changing fonts and more. You can upload your existing files of the formats DOC, XLS, ODT, ODS, RTF, CSV, PPT, etc.

ajaxWrite is a web-based word processor that can read and write Microsoft Word and other standard document formats. For ease of use, ajaxWrite has been designed to look like Microsoft Word. ajaxWrite handles all the popular document formats and lets you save your work right to your hard drive.

Num Sum : Create online, simple, sharable web spreadsheets

Spresent is a free Web-based alternative to PowerPoint. Create and edit high-quality Flash presentations online. You can send presentations via e-mail or publish on your web site or blog.

Zoho Writer is a great online word processor that allows you to create and share documents online

Empressr lets you create, share and store flash-based presentations online.  

Preezo is an Ajax web application that gives you the power to create and share professional quality presentations over the web without software or plugins. 

Adobe’s free online word processor with nicelooks and great features. 

Prezentit is a community where you can create (alone or with others), share and show your presentations.

With Thumbstacks.com, you can make presentations - like slideshows, or outlines - right in your web browser. When you're done, you can share your presentations with anyone, anywhere, just by sending them a link.

Peepel is a free online office suite with a word processor, a spreadsheet and many more features. 

ThinkFree : Free online office apps with 1GB of free storage

Still under development , a word processor with very basic features.