Factor is described as 'The Factor programming language combines powerful language features with a full-featured library. The implementation is fully compiled for performance, while still supporting interactive development. Factor applications are portable between all common platforms' and is an app in the Development category. There are more than 10 alternatives to Factor for a variety of platforms, including Windows, Linux, Mac, BSD and Android. The best alternative is Python, which is both free and Open Source. Other great apps like Factor are Java (Free Personal, Open Source), C (programming language) (Free, Open Source), C++ (Free, Open Source) and C# (Free, Open Source).
C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose, powerful programming language. It is regarded as an intermediate-level language, as it comprises a combination of both high-level and low-level language features.
Haskell is an advanced purely-functional programming language. An open-source product of more than twenty years of cutting-edge research, it allows rapid development of robust, concise, correct software.