North Carolina Child Support Calculator determines the child support that a person owes pursuant to the NC Child Support Guidelines. It's accurate in all cases involving a family income of less than $300,000 per year. The calculator incorporates health insurance costs, child care costs, and obligations for pre-existing children and extraordinary needs. The guideline child support amount is the standard provided by the North Carolina Courts and is adhered to in nearly all child support cases. It is current as of 2009. The intent of this calculator is for informational and educational purposes only. This calculator provides only an estimate and is not a guarantee of the amount of child support that will be ordered.

Mortgage Calculator is a Silverlight application that provides a mortgage calculator that can be embedded into Web sites. It can be used to appraise the amount of equity built within any period and estimate the costs involved, including PMI and taxes. The dynamically updated parameter fields are synchronized with the entry fields' data as one clicks on the adjustment arrows. Multiple adjustable parameters allow for refined results, which are presented as graphs and tables.

Chief Database records time series data in real time. Data is compressed to reduce disk requirements and improve performance. Redo logging and caching provide high performance on minimal hardware, with minimal data loss in the event of hardware failure. 1 million coordinates can be processed per second on server-level hardware. All interfaces are SOAP; allowing for easy integration with other systems and Web sites. Data is usually from a telemetered resource, but can also come from SNMP. Chief Trends allows for trending data inside Firefox. Chief Calculator is a Perl calculation engine to manipulate the data in whatever way you want.

SPINA is software for determining constant structure-parameters of endocrine feedback control systems from hormone levels obtained in vivo. The first version of this cybernetic approach allows for evaluating the functional status of the thyroid gland, i.e. thyroid's secretory capacity (GT) and sum activity of peripheral deiodinases (GD).

tmetaCalc is a scientific calculator for BlackBerry devices with a physical keyboard and OS 5 and up. It allows you to type the expression as it is, just like when you use dot-matrix scientific calculators. It has a few dozens built-in functions and constants, but you can always define you own functions. User-defined functions and constants are automatically saved. A typing assistant is provided. For example, when you type 'a', a list of function names and constants that start with 'a' is displayed for you to choose from.

Voynex calculator is a Web browser application designed to evaluate mathematical and JavaScript expressions. The main difference between it and other calculators is that it is possible to enter the whole expression at once instead of entering it step by step. For example, it can evaluate expressions like, "sin(sqrt(PI/3)+sqrt(PI/5))+cos(PI/2+1)", "x=pow(4,5)+3; 3*x+log(x)", or "0xff07+0x1c04*(0x45+0x55>>1)". The power of the JavaScript language itself is used to evaluate expressions of arbitrary complexity. It offers a wide set of mathematical functions to calculate trigonometrical, logarithmic, and other expressions.

The TI-BASIC Compiler allows you to write TI-BASIC programs for the Texas Instruments TI-83 and TI-84+ calculators using your computer instead of the calculator's keyboard. This allows you to spend more time writing code than navigating menus or trying to scroll around the tiny screen on the calculator.

Qtnp is program for math\physics teachers and students. There 4 tools: Pen, Line, Jogged line, and Circle. The software can draw grids, coordinate planes, and graphics. It has flexible settings, presentation mode, support for all base formats, a GUI for blackboards/tablets, and a built-in powerful calculator.