OMake is a build system, similar to GNU make, but with many additional features, including: - Support for large projects spanning multiple directories; - Support for commands that produce several targets at once; - Fast, accurate, automated dependency analysis using MD5 digests; - Portability: omake provides a consistent interface on Win32 and on Unix systems including Linux, OSX, and Cygwin; - Builtin functions that provide the most common features of programs like grep, sed, and awk; - Active filesystem monitoring, where the build automatically restarts whenever you modify a source file.