Question: By default, only the most recently used plan as well as "balanced" are available. How do I display all 3 default power plans? I'd like to avoid third party programs if possible.

Answer: 
Just use the shortcut key `WIN`+`X` which will bring up the mobility center; then you may choose the power plan you want. very simple!!
I'll throw in a late update to this, [Power Scheme Switcher](http://powerschemeswitcher.codeplex.com/), under the MIT license with source code available from the same place. Built in C# on Visual Studio 2012.