GeographicLib is a small C++ library for: geodesic and rhumb line calculations; conversions between geographic, UTM, UPS, MGRS, geocentric, and local cartesian coordinates; gravity (e.g., EGM2008) and geomagnetic field (e.g., WMM2020) calculations.
Geodesy based library (geodetic and geocentric functions)
geoStarsLib has functions for dealing with many geodesy-based problems found in positioning, pointing, and surveying situations. It is useful to determine absolute position on the earth, pointing vectors, coordinate transformations, and other functions.
This is software for display geographical maps, written on C++. It's small and simple library, which allow to use it on PDA (like Palm and Windows Mobile) and desktop.
wwwmap is patch codes which adds mapping functions to webkit. This functions are based on the following member submission for W3C. (http://www.w3.org/Submission/2011/04/)
graphite: a portable graphics library, written in Java, JOGL and Postscript that allows rapid generation of high-quality graphs using an efficient, compact Java engine.