not only there are lots of tools, such as spreadsheets (i.e. [URL="http://spreadsheets.google.com"]google spreadsheets[/URL], [URL="http://www.editgrid.com"]editgrid[/URL], [URL="http://www.irows.com"]irows[/URL], [URL="http://www.numsum.com"]numsum[/URL]), word processors ([URL="http://www.mercuryserver.com/forums/www.writely.com"]writely[/URL], [URL="http://www.mercuryserver.com/forums/www.ajaxwrite.com"]ajaxwrite[/URL]), even a replacement for powerpoint ([URL="http://www.vyew.com"]vyew[/URL]) or a complete office suite ([URL="http://www.thinkfree.com"]thinkfree[/URL], [URL="http://www.ajaxlauch.com"]ajaxlauch[/URL]). A font manager ([URL="http://www.betterfont.com"]betterfont[/URL])
you can also find sites very useful for boards like [URL="http://www.shrinkpictures.com/"]Shrink Pictures[/URL]
for a complete list of web2.0 sites, go to [url]www.go2web20.net[/url]
i recommend using firefox for all these applications :)