Language bindings

Proj.4 bindings are available for a number of different development platforms.

Python

pyproj: Python interface (wrapper for proj.4)

Ruby

proj4rb: Bindings for proj.4 in ruby

TCL

proj4tcl: Bindings for proj.4 in tcl (critcl source)

MySQL

fProj4: Bindings for proj.4 in MySQL

Excel

proj.xll: Excel add-in for proj.4 map projections

Visual Basic

PROJ.4 VB Wrappers: By Eric G. Miller.