ogpf is an object based Fortran 2003 / Fortran 2008 code implements an interface to gnuplot. There are these main procedures in ogpf
plot * plot a single vector v * plot a vector y against vector x * plot up to four pairs of x-y set at the same time * plot a matrix Y versus a vector x
surf surface plotmesh plot contour plot
A demo file,a brief tutorial and the latest version is available at: codeplex.