last
updated 10/17/12

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Geometry 
Graphing 
Fractal 
Graph 
A
2d grapher that is easy to use. That is one of the main reasons I
like it. It supports explicit, parametric, and polar
equations. It can also plot a list of points. In addition,
it has support for shading (useful for inequalities or area under the
curve). It also has some built in calculus
functions like being able to find length of a curve or area under a
curve. 
GraphCalc 
An
easy to use 2d/3d grapher. For 2d graphing, it can do explicit,
parametric, or polar For 3d graphing, it only does functions of two
variables, either Euclidean or polar. The ease and 'prettiness'
of the graphs is the main draw. I love being able to rotate the
3d graphs with my mouse and I love having a fully shaded surface rather
than just a wire mesh. I also appreciate the speed and
responsiveness of the program. Despite last being updated in
2004,
it runs very well on modern PCs. 
Winplot 
This
is one of the more powerful free graphers that I've come across, but it
is also one of the most cumbersome to use. It can graph the
widest array of 2d/3d graphs I've seen (explicit, implicit, parametric,
polar, and spherical). But be warned, it has a
steep learning curve. Even something like rotating a 3d figure is
nonintuitive. You have to use the keyboard; you can't just drag
with a mouse. While not horrible, it's little things like this
that make it difficult. However, if you take the time to learn
it, it is quite powerful and has the potential to produce very nice
looking graphs. 