The first pack is the Oculus Sample Framework. It contains three sample scenes as well as guidelines on how to accomplish fundamental VR-related functionality. This partial list of scripts gives you an idea of the types of functionality that you can discover using this free asset package:

• Boundary
• Camera rig
• Debug head controller
• Display
• Grabbable
• Grabber
• Haptics
• Haptics Clip
• Input
• On Complete Listener
• Overlay
• Platform Menu
• Reset Orientation
• Touch Pad
• Tracker

There are also animations, materials, meshes, prefabs, scenes, shaders, and textures as part of this asset package. In addition, there are also help text files. 

Using this asset package is a great way to kick-start your virtual reality exploration.