GeographicLib 1.52 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The following versions: 1.5, 1.4 and 1.2 are the most frequently downloaded ones by the program users. The actual developer of the free program is Charles Karney. GeographicLib relates to Development Tools.
From the developer:
GeographicLib is a small set of C classes for performing conversions between geographic, UTM, UPS, MGRS, geocentric, and local cartesian coordinates, for gravity (e.g., EGM2008), geoid height, and geomagnetic field (e.g., WMM2010) calculations, and for solving geodesic problems. It is a suitable replacement for the core functionality provided by geotrans.
You may want to check out more software, such as C++ Compiler, Sun Java Toolkit for CDC or MIDletPascal, which might be similar to GeographicLib.