Downloading Messerschmitt Bf-109 for FSX 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. The following version: 1.0 is the most frequently downloaded one by the program users.
The actual developer of the software is Flight One Software, Inc. The program's installer is commonly called fsx.exe or JAB_FSX.exe etc. Messerschmitt Bf-109 for FSX is included in Games. We recommend checking the downloaded files with any free antivirus.
From the developer:
Messerschmitt Bf-109 features:
- Highly accurate VC, with many functioning parts
- ReviC12D gunsight, that can be turned on and off
- 7 different models to cover variations
- Each model features versions with and without pilot lifejacket, for over-water flights
- 7 different textures
- Accurate and challenging ground-handling characteristics;
- Droppable Drop Tank, that removes weight and fuel from the aircraft.
You may want to check out more software, such as SCS Tupolev Tu-134A-3 FSX FSX-Steam, Super King Air B200 FSX / P3D or Airbus A380-800 VC Air France FSX & P3D, which might be related to Messerschmitt Bf-109 for FSX.