Isosceles is an easy-to-use geometry drawing app, available for iOS and Mac. You can use it to create compass-and-straightedge constructions, draw precise diagrams on an isometric grid… the possibilities are wide open. You can measure the slope, length, radius, circumference, and other information about figures easily. Also, construct midpoints, perpendicular bisectors, angle bisectors, and altitudes that update live to stay attached to their parent objects.
Check out the free iOS version of Isosceles as well!
An intuitive, versatile graphing calculator app for algebra and calculus. With My Grapher, you can graph myriad functions including trigonometric, hyperbolic, greatest integer, and absolute value. Evaluate functions by touching the grid, calculate tangent lines and zeros with a tap, convert linear equations between forms easily, and access a library of reference on each of the functions available.
This is the most beautiful sheet music viewer app you will ever find on the App Store. It includes everything you need to perform (including a night mode) and no intimidating paraphernalia. P.S. There is a secret area in this app: scroll up in the scores view to find it. Your clues are —UP BEAT COLOR—.
Need free sheet music to use in ScoreReader? Check out my list of suggestions from around the Web.
The Rock Cycle
An interactive story about the rock cycle in poem format. Great for teachers and students!
StageIt is a simple lung cancer staging tool. Using a question-and-answer format, you can determine the stage of a lung cancer patient.