1) Free software programmed in C
Found on
https://www.crosswordclues.com/clue/cygwin
Cygwin (n {respell|SIG|win}) is a Unix-like environment and command-line interface for Microsoft Windows. Cygwin provides native integration of Windows-based applications, data, and other system resources with applications, software tools, and data of the Unix-like environment. Thus it is possible to launch Windows applications from the Cygwin env...
Found on
http://en.wikipedia.org/wiki/Cygwin
No exact match found.
