Geogram is licensed under the 3-clauses BSD License (also called "Revised BSD License", "New BSD License", or "Modified BSD License"):

Copyright (c) 2012-2014, Bruno Levy All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of the ALICE Project-Team nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

If you modify this software, you should include a notice giving the name of the person performing the modification, the date of modification, and the reason for such modification.

Contact: Bruno Levy: Bruno.Levy@inria.fr, http://www.loria.fr/~levy

ALICE Project LORIA, INRIA Lorraine, Campus Scientifique, BP 239 54506 VANDOEUVRE-LES-NANCY CEDEX FRANCE

Modifications:
Peter Beben     2023/02/07: Microsoft C++ Standard Library - Modifications under license: Apache v2.0 with LLVM Exception
Evan Sullivan   2024/03/08: Removed TETGEN and LM6 sources and license attributions. Removed LMIOHandler from mesh_io.cpp.

Bundled third-party software
Geogram uses the following softwares:

AntTweakBar: Simple OpenGL GUI (by Philippe Decaudin) - License: zlib/libpng
Exact predicates (by Jonathan Shewchuk) - License: Public Domain
HLBFGS: Numerical optimization (developed by Yang Liu during his post-doc at Inria)
RPLY: .ply file format I/O (by Diego Nehab) - License: MIT
Optionally, Geogram can be compiled with additional libraries (see "How to compile" )

TRIANGLE: mesh generation (by Jonathan Shewchuk) (free for academic use, contact Jonathan Shewchuk for other uses)
FPG: Predicate filter generator (by Andreas Meyer and Sylvain Pion)
Some test programs use the following libraries to validate the algorithms:

ANN: Kd Tree (by David Mount) - License: LGPL