ACM 6.0 flight simulator

ACM 6.0[0] is a heavily extended fork made by Umberto Salsi[1] (since 2008 and maintained until now) from original ACM 5.0 developed by Riley Rainey.

> Riley Rainey founded Web Simulations in August 1997.

> Back in 1991, Riley released the first free multiplayer air combat simulation for UNIX systems, ACM. He enhanced the program over time -- in 1996 it was integrated with the U.S. Department of Defense sponsored Distributed Interactive Simulation protocol (DIS). Integration with DIS allows ACM to interact with simulations written by a variety of defense contractors.

> Now Web Simulations is bringing this technology to the rest of the world.

Original ACM 5.0 developed until 2000: firstly as commercial software (binary and source code) for Windows, but later released as FLOSS app for UNIX (where source code was rewritten from Visual C++ to pure C).[2,3]

FTR, Linux packages build from original ACM 5.0 source still included in all popular Linux distributions.[4]

P.S. There is also GNU ACM 5.1 - another fork made by GNU/FSF devs from original ACM 5.0, but it was never included as package in Linux distributions and not updated since 2011.[5,6]

[0] http://www.icosaedro.it/acm/manual/acmdoc-basic.htm

[1] http://www.icosaedro.it/en-index.html

[2] http://web.archive.org/web/19981206125848/http://www.websimu...

[3] http://web.archive.org/web/20130113053006/http://www.websimu...

[4] https://repology.org/project/acm/versions

[5] https://directory.fsf.org/wiki/Acm

[6] https://ftp.gnu.org/gnu/acm/