Fortran is described as '(previously FORTRAN, derived from Formula Translating System) is a general-purpose, imperative programming language that is especially suited to numeric computation and scientific computing' and is an app in the Development category. There are more than 10 alternatives to Fortran for a variety of platforms, including Mac, Windows, Linux, BSD and Android. The best alternative is C (programming language), which is both free and Open Source. Other great apps like Fortran are C++ (Free, Open Source), D (Programming Language) (Free, Open Source), F# (programming language) (Free, Open Source) and V (programming language) (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.
Pike is a dynamic programming language with a syntax similar to Java and C. It is simple to learn, does not require long compilation passes and has powerful built-in data types allowing simple and really fast data manipulation.