pktools is a collection of programs written in C++ to perform operations, mostly on raster images. It heavily relies on the Geospatial Data Abstraction Library (GDAL, http://www.gdal.org) and OGR. Programs run on Linux and Windows with a command line interface.
At one point, Open Hub analyzed source code for this project based on code location(s) available at that time. Since then, the code locations have been removed.