Unity operates a store called the Unity Asset Store. There are a great number of assets available to Unity developers. The store is accessible directly on the web at http://assetstore.unity3d.com. You can also open a window within Unity to display the Asset Store. This is done by selecting Window | Asset Store.
Regardless of how you connect to the Unity Asset Store, you will see a hierarchical category listing in the top-right-hand corner of the store. As you can see in the following screenshot, there are eleven asset categories:
Clicking on the triangular icons to the left of each category reveals subcategories. ...
