| MathAid Geometry |
 Interactive tutorial with problems and tests |
|
| XICalc |
 Extra Precision Integer Calculator in C# |
|
| XZCalc |
 Extra Precision Complex Matrix Calculator |
|
| MaTris |
 practice arithmetic skills with Tetris reward |
|
| Prime Number Calculator |
 Calculate the prime numbers between any two limits. $4.95 for 10 utility suite. |
|