Useful open source applications include the popular web browser mozilla firefox, the e-mail application thunderbird, the relational database management server mysql, and the powerful programming language
c++
perl
xml
rpg

C++

Explanation:

C ++ is an object-oriented programming language that takes the basis of the C language.

C ++ is a programming language designed in the mid-80s by Bjarne Stroustrup. The intention of its creation was to extend to the successful programming language C with mechanisms that allowed the manipulation of objects. In that sense, from the point of view of object-oriented languages, C ++ is a hybrid language. Subsequently, generic programming facilities were added, which added to the other two paradigms that were already admitted (structured programming and object-oriented programming). This is why it is often said that C ++ is a multiparadigma programming language.

At present, C ++ is a versatile, powerful and general language. His success among professional programmers has led him to occupy the first position as an application development tool. The C ++ maintains the advantages of the C in terms of operator wealth and expressions, flexibility, conciseness and efficiency. In addition, it has eliminated some of the difficulties and limitations of the original C.

PERL

Explanation:

PERL (Practical Extraction and Report Language) :This is an Open Source software, that is licensed under its Artistic License, or the GNU General Public License (GPL).

Perl is a popular programming language that carries out a lot of functions and applicable in many applications, it was initially developed for just manipulation of text but is currently being used for a whole lot more, it used for a multiple tasks like web development and network programming.

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