iCloud is a cloud computing service which gives you a free 3Gb space with lots of applications inlcuding mail and messenger services. You can imagine this as almost a virtual computer where alomost everything is configurable . Here is snamshot which you can click to see an enalrged view to start with
iCloud Control Panel
The looks are closer to Vista Desktop where you have lots of gadgets and stylish sidebars and all. You can connect to mail services which support IMAP. You have even a control panel and settings to configure your own cloud OS. Have a look
iCloud Desktop wallpaper changer
iCloud Drive explorer
You have even access to your cloud drive which allows you to manage all the applications and files in tree like structure i.e. like windows explorer things.
In this iCloud there are huge numbers of small and big applications are supported like notepad, RSS reader, Media Player, Their own social networking, mail, photos and presentations and more. There are lot of widgets alos availble which you can use on the sidebar.
iCloud Application List
iCloud Mail Settings
iCloud Sidebar widgets
Then we have a start menu like structure available here. Which are divided into applications , system and search menu.
iCloud is a product of Xcerion which aims to distribute an Internet OS with accompanying applications free as a massive service over the Internet. The advantage you get here is you don’t pay for any of the softwares available in the iCloud OS