DreamCalc Graphing Calculator
DreamCalc is the smarter alternative to a hand-held Graphing Calculator for your PC or laptop! You'll get the intuitive feel and productivity of using a professional hand-held, but one which adapts to your way of working. With DreamCalc, you'll be able to graph functions and plot list data more... Select from Reverse Polish Notation or two styles of algebraic input, and with the optional ability to run in your Windows system tray--DreamCalc will always be there whenever you need to reach for a calculator.
http://www.dreamcalc.com/downloads/dc3g_setup.exe - 3Mb - Download - Screenshot

MadCalc
MadCalc is a full featured graphing calculator application for your PC running Windows. With MadCalc you can graph rectangular, parametric, and polar equations. Plot multiple equations at once. Change the colors of graphs and the background. Use the immediate window feature to evaluate complex... Students can use it instead of that tiny calculator screen while you are doing your calculus homework. ... MadCalc provides all the essential graphing functionality without the complexity, cost, or overhead of something like Mathematica or MatLab.
http://www.madlogic.com/download/MC_INST.EXE - 387Kb - Download - Screenshot

Math Mechanixs
Math Mechanixs is an easy to use general purpose FREE math software program. (FREE registration is required after 60 days). The typical tool for obtaining answers to a mathematical problem has been the calculator. Unfortunately, a calculator can be very limiting. ... Until the graphing calculator, the user could not graph their data either. ... These graphs can be custom labeled by the user. ... Math Mechanixs also allows the user to create beautiful 2D and 3D graphs from functions or data points.
http://www.mathmechanixs.com/download/mathmech10021.exe - 6Mb - Download - Screenshot

Advanced Grapher
Powerful but easy-to-use graphing, curve fitting and calculating software. Graphs Cartesian (Y(x) and X(y)), polar and parametric functions, graphs of tables, equations (implicit functions), inequalities and slope fields. Up to 100 graphs in one window. ... Calculus features: regression analysis, obtaining zeroes and extrema of functions, intersections, derivatives, equations of tangents and normals, numerical integration, value tables, calculator. ... The program has printing capabilities, multi-document interface, customizable toolbars.
http://www.alentum.net/files/agrapher.zip - 1Mb - Download - Screenshot

ZGrapher
This graphing calculator can plot y(x), x(y), polar, parametric and table-defined functions. All your graphs and coordinate space may be fully customized. You can comment your graphs using labels and legend. For a few seconds you can obtain derivatives, tangents, normals and calculate integrals. ... Results of your work may be exported to Word or saved as BMP, GIF and PCX pictures. ... Regression analysis will help you to find trend of your data.
http://www.zgrapher.com/zgrapher.zip - 621Kb - Download - Screenshot

DreamCalc Financial Calculator (Pro)
DreamCalc Professional is the smarter alternative to a hand-held Financial Calculator for your PC or laptop! You'll get the intuitive feel and productivity of using a professional hand-held, but one which adapts to your way of working. With DreamCalc, you'll be able to graph functions and plot... Select from Reverse Polish Notation or two styles of algebraic input, and with the optional ability to run in your Windows system tray--DreamCalc will always be there whenever you need to reach for a calculator.
http://www.dreamcalc.com/downloads/dc3p_setup.exe - 3Mb - Download - Screenshot

MathCalc
MathCalc run with the calculator and graph plotter mode. Within the calculator mode, you can compute mathematical expressions, trigonometric, hyperbolic or logarithmic functions. The entered expressions and functions are saved into formula lists. The program has a handy, easy-to-use formula... Within the plotter mode, you can plot 2D graphs a few ways: using tabular data, importing the data from files, pasting data from Windows clipboard or assigning Cartesian (y = f(x)), polar (r = f(u)) or parametric (x = f(u); y = f(u)) functions.
http://www.ypssoft.com/program/matce2_1.zip - 1Mb - Download - Screenshot

3D Grapher
3D Grapher is a feature-rich yet easy-to-use graph plotting and data visualization software suitable for students, engineers and everybody who needs to work with 2D and 3D graphs. 3D Grapher is small, fast, flexible, and reliable. It offers much of the functionality of heavyweight data analysis... You can specify the unlimited number of equations and tables and their graphs will be plotted in one coordinate system using different colors and lighting conditions. ... Other program features include: 1) Built-in expression calculator 2) Mouse cursor coordinate tracking 3) Fully customizable...
http://www.romanlab.com/3dg/3dg.zip - 836Kb - Download - Screenshot

CallApp
CallApp is a call timer used to time your calls, it also integrates a handy tabbed notepad to jot your notes down. With the gathering of call statistics you can export them as Excel spreadsheets with graphed statistics. These graphed statistics include your Call Average, Not Ready Average, Time... CallApp has been built from the ground up to provide the best tool for handling calls and staying on top!
http://www.callapp.net/home/portal...pp%20Setup%20v2.1%20Build%202.exe - 574Kb - Download

CplxCalPro
CplxCalPro, CCP, is the most powerful programmable graphicalcalculator for the palm platform. While this calculator is not necessarily designed just to balance your checkbook, you could easily do so. CplxCalPro allows you to perform the most advanced calculations and function graphing without... After developing and testing your programs on the PC or MAC you can save the programs and hotsync them to your handheld. ... The user manual explains how to do this. ... Use the Emulator to write your programs for CplxCalPro on a PC or MAC.
http://www.adacs.com/UserPrograms/CplxCalPro/CplxCalPro.zip - 231Kb - Download - Screenshot