Some time ago I had posted my "Business Idea" in my other blog, where I put forth the idea of taking our whole document-creation activities online. In other words, why have to install an OS-specific document / spreadsheet / presentation suite of software if it can be made available online?
Thinkfree.com has done just that.
Now you no longer have to worry about installing the version compatible with your OS. Just sign up and create your document / spreadsheet / presentation with thinkfree's browser-based editor. ThinkFree gives you 1 GB of space free of charge to save your file, so you can work on it from different locations, share it with others, or just store it there till you need it.
ThinkFree's "share" option is, in my opinion, one of the coolest features of the site. I'm already collaborating with two different people, one in Mumbai and the other in the UK, on two different projects, using ThinkFree's "share" function. Just imagine, I and my collaborators can modify and check the files any time, no matter where we are. Got a brainwave? Just log into the site and put it down in the document for the collaborators to see when they next check in.
Way beyond cool!