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  Analyzed 16 days ago

OpenTTD is a clone of the Microprose game "Transport Tycoon Deluxe", a popular game originally written by Chris Sawyer. It attempts to mimic the original game as closely as possible while extending it with new features.There is currently an effort underway to replace the original, copywrited, graphics with new original content.

247K lines of code

4 current contributors

9 months since last commit

121 users on Open Hub

Very Low Activity



  Analyzed 2 months ago

Stellarium renders 3D photo-realistic skies in real time with OpenGL. It displays stars, constellations, planets and nebulae, and has many other features including multiple panoramic landscapes, fog, light pollution simulation and a built-in scripting engine. Stellarium comes with a star ... [More] catalogue of about 600 thousand stars and it is possible to download extra catalogues with up to 210 million stars. Stellarium has multiple sky cultures - see the constellations from the traditions of Polynesian, Inuit, Navajo, Korean, Lakota, Egyptian and Chinese astronomers, as well as the traditional Western constellations. It is also possible to visit other planets in the solar system - see what the sky looked like to the Apollo astronauts, or what the rings of Saturn looks like from Titan. [Less]

575K lines of code

24 current contributors

2 months since last commit

93 users on Open Hub

Activity Not Available
Licenses: BSD-3-Clause, CC-BY-3.0, GPL-2.0+



  Analyzed 11 days ago

Celestia is an OpenGL-based 3D space simulation for Unix and Win32 that lets you travel through the solar system, to the stars, and even beyond the galaxy. Visit over 100,000 stars, 100 solar system bodies, and all known extrasolar planets.

238K lines of code

0 current contributors

almost 4 years since last commit

65 users on Open Hub


BZFlag - Multiplayer 3D Tank Game


  Analyzed 4 months ago

BZFlag is a 3D, multiplayer, tank battle zone, capture the flag game that pits players against each other in a networked environment. It runs on Windows XP/Vista/7, Linux, Mac OS X 10.6+, and others. An OpenGL accelerator is highly recommended.

182K lines of code

7 current contributors

4 months since last commit

50 users on Open Hub

Activity Not Available

FlightGear Flight Simulator


Claimed by FlightGear Analyzed 17 days ago

The FlightGear flight simulator project is an open-source, multi-platform, cooperative flight simulator development project. The goal of the FlightGear project is to create a sophisticated flight simulator framework for use in research or academic environments, for the development and pursuit of ... [More] other interesting flight simulation ideas, and as an end-user application. We are developing a sophisticated, open simulation framework that can be expanded and improved upon by anyone interested in contributing. NOTE: this Ohloh page only tracks FlightGear's source repository. For FlightGear data (aircraft, models, sounds etc.), see https://www.ohloh.net/p/flightgeardata [Less]

808K lines of code

26 current contributors

20 days since last commit

34 users on Open Hub

High Activity

Spring RTS Engine


  Analyzed 3 months ago

Spring is a versatile 3D RTS game engine. Using extensively Lua for scripting game-specific code to make nearly every aspect of the engine customizable, from GUI, to unit AI, to pathfinding.

577K lines of code

20 current contributors

3 months since last commit

28 users on Open Hub

Activity Not Available



Claimed by KDE Analyzed 4 months ago

KStars is a graphical desktop planetarium for KDE. It provides an accurate simulation of the night sky, as seen from any location on Earth, on any date. It has a host of tools for every astronomer and astronomy enthusiast!

195K lines of code

20 current contributors

4 months since last commit

27 users on Open Hub

Activity Not Available

Open Dynamics Engine


  Analyzed 4 months ago

ODE is an open source, high performance library for simulating rigid body dynamics. It is fully featured, stable, mature and platform independent with an easy to use C/C++ API. It has advanced joint types and integrated collision detection with friction. ODE is useful for simulating vehicles ... [More] , objects in virtual reality environments and virtual creatures. It is currently used in many computer games, 3D authoring tools and simulation tools. [Less]

285K lines of code

0 current contributors

about 3 years since last commit

22 users on Open Hub

Activity Not Available
Licenses: No declared licenses



Claimed by Argonne National Laboratory Analyzed 17 days ago

PETSc, pronounced PET-see (the S is silent), is a suite of data structures and routines for the scalable (parallel) solution of scientific applications modeled by partial differential equations. It employs the MPI standard for parallelism.

652K lines of code

52 current contributors

17 days since last commit

18 users on Open Hub

Very High Activity



  Analyzed 17 days ago

OOFEM is an open source multi-physics parallel finite element code with object oriented architecture. The aim of this project is to provide efficient and robust tool for FEM computations as well as to offer highly modular and extensible environment for development.

272K lines of code

10 current contributors

18 days since last commit

18 users on Open Hub

Moderate Activity