It exists and it's called Zoho. Besides the classic spreadsheet, word processor and presentation tools, also includes web conferencing, a planner, a project manager, a database, a wiki manager, chat, e-mail and even a CRM application. It is also really easy to use.
You just need to sign up and it's all done. On your account you will find a menu with all the possibilities:
Zoho Sheet Online spreadsheet service
Zoho Meeting Meeting - Web Conferencing
Zoho Show Online project manager
Zoho Writer Online word processor
Note Book Online Note Taker
Zoho Creator Online web applications creator
Zoho Planner Online organizing tool
Zoho Chat Instant messaging and group chat tool
Zoho Wiki Online Wiki with public, private & group permissions
To make it even easier some of the applications provide an explanatory video. Just have in mind that some of the tools like the project manager and the CRM are free up to a point where you will have to pay an upgrade or on a project basis.