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Open Source - A-A-P is an experimental make tool. Features include a special AAP makefile syntax, automated dependency support for Unix C programs, and a GUI interface written in Python.

Electric Cloud - A make replacement that distributes builds across multiple cluster machines for faster builds. Features plug-compatibilty with GNU Make and Nmake.

Freeware - A build system based on GNU Make and GNU M4. It automates many mundane tasks including creating Doxygen documentation.

Freeware - Not Ant is like Ant, but uses C# and .NET technologies.

Opus - A multiplatform make featuring dependency scanning, suffix-specific viewpaths, extended command and macro modifiers, CPP preprocessor directives, and iterators in the Make rule language.

Freeware - A make replacement like Cons, written in Python and featuring MD5 file signatures, dependency scanning, parallel build threads, viewpathing, multidirectory builds, and Python build actions.