This is another 2 in 1 Post since these are both very simple elements already Included in Unity Free & Pro.
Character Controller (1st Person) : This is exactly what you would think its a controller that allows you to move around the Game Scene in 1st Person View and move using WASD controls. This controller is a great start for anyone wanting to start a 1st Person Game. The 1st Person Control Includes a Capsule (This the the Collider). and a few scripts for Mouse Look, Movement, Jumping, Sliding etc. To add it to the scene Drag & Drop in.
Character Controller (3rd Person): Same with the 1st Person Controller this allows you to move around in the scene the only difference is the Camera is behind the Collider. The Capsule is also replaced with a 3D Model (By Default its the Unity 3D Guy) You can replace this with your own Including Animations (this will be covered in another tutorial)
To Import The Character Controller go to the Project Window go to Assets/ Import Package/ Character Controller. More Info on Controllers can be found –Here
Image Effects (Standard): Image Effects are Post can be applied to Prefabs or Cameras to create different Post Effects. with Unity Free you can take advantage of Anti-Aliasing, Bloom & Lens Flares, Color Correction, Depth of Field, Edge Detection, Noice & Grain, Tone Mapping, Vignetting more. These cannot all be explained at once the best way is to test them for yourself. If your familiar to 3D you’ll understand most of these already.
Image Effects (Pro Only): Similar to the Standard Image Effects this Package is only available to Pro/Paid Users. These Include allot more Post Effects such as Glow, Grey-scale, Motion Blur, Fog, Fisheye, Sun Shafts, Distance Blur etc. Again all of which can be applied to Prefabs or Cameras.
To Import The Image Effects go to the Project Window go to Assets/ Import Package/ Image Effects (Pro Only). Standard Effects are Included in a new Unity Scene Under Standard Assets/ Editor/ Image Effects. More Info on Controllers can be found – Here
