To view all the applications and system utilities installed, you click on the Ubuntu icon, which is at the point where the Launcher and the (top) panel meet. In this alpha release, the application categories (Places, in Unity jargon) are not in place yet.
And this shows a context menu. Part of the problem with Unity is that you cannot add an application to the launcher from the application window. You may only “pin” a running application to the Launcher by right-clicking on its icons (on the Launcher), and choose “Pin to Launcher”.
The application window in List View.
And in Compact View.
The search feature of Unity is one of its weaknesses. It is definitely not as polished as SAL of the KDE Plasma Netbook interface. To search for an application in Unity, click on the Go menu and select “Search for Files.”