From the main application window you can access a series of tabs with all the available features. The first, for instance, displays all your different email accounts as well as a feed reader. Other tabs organize your contacts (friends, family, employees...), projects, and purchases.
Below the main window you have an Internet browser open at all times so you can visit any website while doing anything else.
Noah is a comprehensive application likely to be quite useful for people with very active personal or work lives (as in fact the software can get rather complicated).