M_Map is a set of mapping tools written for Matlab (it also works under Octave). M_Map includes:
1. Routines to project data in 21 different projections (and determine inverse mappings), using spherical and ellipsoidal earth-models.
2. A grid generation routine to make nice axes with limits either in lat/long terms or in planar X/Y terms.
3. A coastline database (with 1/4 degree resolution).
4. A global elevation database (1 degree resolution).
Hooks into freely available high-resolution coastline and bathymetry databases.
5. Other useful stuff.

I have not found out which license is used.