Gwyddion is a modular program for Scanning Probe Microscopy (SPM) data
visualization and analysis. It is primarily intended for analysis of height
field data obtained by microscopy techniques like Atomic Force Microscopy (AFM),
Magnetic Force Microscopy (MFM), Scanning Tunneling Microscopy (STM),
Near-field Scanning Optical Microscopy (SNOM or NSOM) and others. However,
it can be used for arbitrary height field and image analysis.

Homepage:
https://gwyddion.sourceforge.net/
