Creating graphs and diagrams on soft-documents (1 Viewer)

[asianese]

Hey all,

Was wondering what types of programs/plugins/software people use to create their graphs (x-y plane types) or diagrams (shapes, 3D objects) for exam questions or notes.

This is from NSB 2011 3U trial, and it's in LaTeX but I'm unsure of the plugin or app..:

and the HSC 2012 3U paper

I'd definitely appreciate anyone that can shed some light on this!

Thanks!

 

[Carrotsticks]

http://www.tug.org/pracjourn/2007-1/beccari/beccari.pdf

http://en.wikipedia.org/wiki/PSTricks

 

[asianese]

Thanks a bunch