Tapper is basically a drum pad, but one that allows you to use your own sounds!

With Tapper you can choose your sounds to associate with up to 20 drum pads. Upload your sound files using your PC's web browser and WiFi. You can categorize the sounds with the use of folders.

The pads can be moved around and saved to profiles. Profiles also save the pad to sound file associations. Save as many profiles as you like.

If you like you can set background music to play along with. Its volume can be adjusted.

You can record your compositions using the built in mic. Press the Record button and give it a name, it will be saved in the Recordings folder ready for WiFi download to your PC, pad association or background music.

New! Now allows Sticky Pads, where the sound is looped until the pad is depressed. Configure which pads are sticky using Settings/Sticky Pads. Profiles will save these settings.

Important: To activate the top menu use a three finger swipe down.

See it in iTunes here

GMP Calc

GMP Calc is not a calculator that can be easily overwhelmed.  Enter as long and complex a formula as you like and it will provide an answer to the precision of your choice, the default is 10000 significant digits! Optimized for different CPU's, it will detect and automatically use the quickest libraries for your configuration. This applies to 64 bit operating systems only, 32 bit OS's will use slower generic libraries, so 64 bit is recommended.

GMP Calc

GMP Calc will run on any Windows version, 32 or 64 bit, with .Net 2.0.

Download Windows x86/x64 installer here. (v1.2 updated 2013/02/16)

Download Source Code here.

If you've got an iPhone or iPad, grab it from iTunes here.

Currently supported functions: abs, acos, acosh, asin, asinh, atan, atanh, cos, cosh, cot, cot, coth, csc, csch, exp, ln, log, log10, log2, pi, sec, sech, sin, sinh, sqrt, tan, tanh.

/ * + -
^ is power (2 ^ 3)
% is modulus (16 % 3)
! is factorial (5!)

x, y, z can be substituted using provided input boxes, accepts both formulas and numbers.

Libraries used:

MPIR v2.6.0 http://www.mpir.org/mpir-2.6.0.tar.bz2

MPFR v3.1.1 http://www.mpfr.org/mpfr-current/mpfr-3.1.1.tar.bz2

MPFR in .NET http://mpfr.codeplex.com/