The 3.0.0001 version of M-209 is provided as a free download on our software library. M209.exe is the default file name to indicate the M-209 installer. The current setup file available for download requires 1.7 MB of hard disk space. Our antivirus analysis shows that this download is virus free. M-209 is included in Education Tools. The most popular versions among the program users are 3.0 and 2.1. The actual developer of the free program is DEFCOM.
From the developer:
This simulator, fully compatible with the original cipher machine, enables realistic operation with rotating wheels, setting of wheel pins and drum lugs, combined with authentic graphics. The program comes with a very complete helpfile, containing the manual, the enciphering procedures from the US military and all technical details on the machine. There's also a picture gallery. Complete with formatted clipboard and Autotyping function. With this program you will be able to work with the M-209 and examine how it works and how it was operated. This is a true reference to the M-209 , and an educational must!
You may want to check out more software, such as Water Test, SOUL or Ostberg Fan Selection Program, which might be similar to M-209.