Zoho

Where ThinkFree concentrates on out-and-out mimicry of Microsoft Office and Google Docs aims for simplicity and speed, Zoho has adopted an everything-but-the-kitchen-sink approach.
Online word processor? Check. Spreadsheet? Check. Presentations? Check. And so on through project management, invoicing, database, web-conferencing, note-taking, instant-messaging, scheduling, email and customer-relations applications. Indeed, there are a few more that we haven’t mentioned.
Zoho apps emulate their Microsoft Office equivalents to the same extent as ThinkFree. Yet, while ThinkFree’s apps operate at a snail’s pace, Zoho’s tools are smoother – but still not up there with those provided by Google Docs.
Zoho’s wide range of applications, however, are only free for ‘personal use’. If you’re a business or corporate user, expect to pay for some services. Zoho Docs, for example, will set you back 
$3 per month (about £1.80), though for this you’ll get 5GB of online storage instead of the usual 1GB.