The source code is managed by SVN and is hosted by TIS Innovation park in Bolzano (Italy) as a private project.
For download, visit https://dev.fsc.bz.it/ and register as a new user giving a login name and password. Then, communicate by email your login name to the SVN projects administrator (Matteo Dall'Amico <matteo@mountain-eering.com>) who will activate your account on the GEOtop project.
Once activated, you can view the source code on https://dev.fsc.bz.it/private/websvn/listing.php?repname=geotop (you must type your login name and password to access the webpage).
GEOtop developers are highly welcome. If you want to develop and improve part of the code, please subscribe https://dev.fsc.bz.it/ and send a request to the GEOtop administrator (Matteo Dall'Amico <matteo@mountain-eering.com>) and you will be guided to become a member of the GEOtop project.
The current maintained version is available at: https://dev.fsc.bz.it/private/repos/geotop/tags/GEOtop_1.45 You can download GEOtop in the following way:
Download GEOtop executable (not maintained... see Download GEOtop source code)
To see how to compile: Compile Instructions
To download a template simulation: Simulation Templates