DB Calc for Windows 

Scientific calculator and function plotter. Logic operators. Three angle units. Square and cubic roots. Trig. and hyperbolic functions. Logarithm. Numerical Integration. Plot fucntions: linear and logarithmic plots. Parametric plots. Zoom function.
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Boxer Text Editor 

Save time and effort with this versatile, full-featured Windows text editor. Boxer is extremely powerful, but remains easy-to-use for both beginners and experienced users. Features macros, 2GB files, syntax coloring, FTP, HTML, undo and much more.
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Graphit 

Low cost 2D function plotting software. Use up to 8 functions with cascades. Displays 2 simultaneous plots with cursors positions and deltas. File load, save, and print. Input point overlays for curve fitting. Trig, Ln, Log functions supported.
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FNA 

Multi-function calculator and unit conversion utility. Four modes of operation (statistics, trigonometry, base-n, and unit conversion). Many functions, formula entry mode. Up to 26 separate memory registers. Even includes periodic table of elements.
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Numero 

Numero is a calculator with some nice features. It has a text box that displays all of expressions and answers that have been calculated, and there is eye candy, such as fading in/out and customizable colors.
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