Calcpad is described as 'lightweight mathematical platform for cloud and desktop. It parses simple text scripts and converts them into professional Html reports. Supports complex numbers, variables, functions, graphing, units and numerical methods' and is a Calculator in the Office & Productivity category. There are more than 10 alternatives to Calcpad for a variety of platforms, including Windows, Online / Web-based, Linux, Mac and Windows Mobile. The best alternative is Mathematica. It's not free, so if you're looking for a free alternative, you could try SciPy & Numpy or fxSolver. Other great apps like Calcpad are Maple (Paid), SymPy (Free, Open Source), SMath Studio (Free) and PTC Mathcad (Paid).
SymPy is a Python library for symbolic computation. The stated goals of the library are to become a full-featured computer algebra system and to keep a simple code base to promote extensibility and comprehensibility.
The Collaborative Computational Notebook Built for Modern Engineering. Enter math as it appears on paper, get instantaneous results, and share your calculations with colleagues and clients. No special syntax, no software, no headaches, no kidding.
Pocket PC calculator for scientific and engineering purposes. This calculator is very bright and easy to use, supports more than 50 functions. The Engineering Calculator has been nominated as the Best Pocket PC Software by Pocket.at in the EUROPE POCKET PC AWARD 2002.