OmniGraphSketch is a graph sketching utility for mac.
Its for sketching graphs or working with import data. It cannot plot functions. Never the less a couple of things mathcad can learn from it.
Watch demo videos of the program
http://www.omnigroup.com/products/omnigraphsketcher/videos/
Ability to click on tick marks and drag to rearrange them
create highlighted regions. like rectangular highlights or better yet highlight regions that are intersected by curves (very awesome)
double click curves to edit their properties.
Draw directly on the graph area, with lines or curves. again useful for highlighting important points on the graph.
import data directly on the graph area.
Beautiful vector graphics.
Double click on the graph area to add text.
PS. I'm not affiliated with the company. plus its a mac program so you won't use it anyway.
