The Nook application can be downloaded here on the market.

Wikipathia is a free app in the Android market that gives you two terms or concepts; then it is your job to essentially connect the dots, making the shortest path between the two things using the massive amount of Wikipedia articles as your links. Once you click start, you are given a Wiki list of everything that comes up in common with your starting term. Clicking on a new term will then give you a new list, hopefully leading you closer to the term you are trying to reach. Each time you click on a new term it counts as a path. The goal is to connect the two original concepts with the fewest number of paths.

You can download this application from the market here.

Robo Defense is a very popular game of strategy that involves the purchase and placement of various tower cannons, used to destroy an enemy army. This is a great game of battle that requires you to plan out your purchases with money that is acquired by the successful destruction of your enemy forces. This is an entertaining game of battle.

You can download this on the Market here.

There has been great debate over which style of keyboard is best on a cell phone, which is the most user friendly. Some believe "real" keys are the most reliable for texting but others have found touchscreen keyboards to be just as good, if not better. Several Android apps give the option to install a new touch keyboard onto your phone to be used instead of the standard, native keyboard. One such app, SlideIT (that's a capital "it" by the way) combines some nice features that enhance the native Android touch keyboard.

Download on the Market here.