1 of 12Image
AirCalc and HD Widgets
There are so many calculator apps for Android that there is a good one no matter what your needs might be. They all have one major problem, though, they take up the whole screen blocking what you are doing.
In steps AirCalc to address this. It is a floating calculator that lets you do your math without blocking the screen. It pops up when called and gets out of the way when you're done. It's my favorite utility on the Nexus 7.
Widgets make Android a thing of useful beauty, and HD Widgets is as good as any. It is configurable to make it as big and useful as the user might want. It has the standard clock and weather modules that can be sized to fit the home screen as desired. All modules are high resolution taking full advantage of the Nexus 7 display.