LAnd Survey Tools "LAST" was created to preserve and expand on the work invested in an old, privately used, DOS based land survey construction and data collection application by porting much of the C++ coded logic and design concept over to Python.
GEOMS2 is a geostatistics and geosciences modeling software. Provides interface for grid (mesh), point, surface and data (non-spatial) objects. It has a 3D viewer and 2D plots using the well known Python engines Mayavi and Matplotlib. It has several functions to manipulate your data as well as provide univariate and multivariate analysis.
NOTE: The software is still an early beta. Please tell us if you found a bug.