Downloading OMP 0.5.1.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. You can run this free PC software on Windows XP/Vista/7/8/10/11 32-bit. The OMP installer is commonly called OMP.exe.
The most popular versions of the program are 0.5 and 0.3. 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 program lies within Games, more precisely Simulation. The actual developer of the free software is Friedrich Kastner-Masilko.
From the developer:
Orbiter Multiplayer Project - Development of a multiplayer framework for Orbiter Space Flight Simulator.
Recreate historic flights with addon spacecraft packages: Mercury, Gemini, Apollo, Vostok and more.
Plan interplanetary slingshots and tour the solar system with futuristic space craft.
You may want to check out more software, such as Ordix Mpack Pro, which might be related to OMP.