Prepar3D SDK 3.4.22.19868 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. The most popular versions among the software users are 3.4, 3.3 and 3.2.
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 latest version of the program can be downloaded for PCs running Windows XP/Vista/7/8/10/11, both 32 and 64-bit. The actual developer of the free software is Lockheed Martin Corporation. Prepar3D SDK lies within Games, more precisely Utilities.
From the developer:
The Lockheed Martin Prepar3D Software Development Kit can be used to develop new models and content, such as aircraft, instruments, and ground vehicles. Prepar3D is fundamentally data driven; there is no limit to the amount of new data, models, or scenarios that can be added.
You may want to check out more software, such as FSX to Prepar3D Migration Tool, OpusFSX for FSX and Prepar3D Flight Simulators or FsPassengersP3D for Prepar3D, which might be related to Prepar3D SDK.
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