If you'r a seasoned developer or just a beginner, Admin Options Pages tries to make it easy for everybody.
I.a. Checkboxes, radio buttons, textfields, textareas, images, colorpickers, numbers, titles, descriptions, horizontal rules. The list with options fields is still growing.
There are option fields which gives you the possibility to overide some default functionalities. For example by using the add_filter function to handle your own validation callback.
With AOP you can save a huge amount of time and money. And yes its free.