AquaTerm is a Mac OS X grahics renderer. It allows command line applications written in ObjC, C, FORTRAN, Lisp, Perl or Python to display vector graphics, text and images using a simple API. Adapters for gnuplot, PGPLOT, and PLplot exists as well.
A Mac OS X framework implemented in Objective-C 2.0 that reads and parses ASCII DXF files. The framework returns an array of custom entity objects that can be used as needed by the program implementing this library.