Tcl (Tool Command Language) is a very powerful but easy to learn dynamic programming language, suitable for a very wide range of uses.

C++ is described as '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' and is a very popular programming language in the development category. There are more than 50 alternatives to C++ for a variety of platforms, including Linux, Windows, Mac, BSD and Self-Hosted apps. The best C++ alternative is Rust, which is both free and Open Source. Other great apps like C++ are Java, C (programming language), C# and Go (Programming Language).
Tcl (Tool Command Language) is a very powerful but easy to learn dynamic programming language, suitable for a very wide range of uses.

Squirrel is a high level imperative, object-oriented programming language, designed to be a light-weight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games.
Jython, successor of JPython, is an implementation of the Python programming language written in Java.

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.

P is a programming language for asynchronous event-driven programming and the IoT that was developed by Microsoft and University of California, Berkeley.
M# is a set of tools for rapid web application development. M# manages 90% of the code through automation and eliminates most human errors. It has been proven to result in better, safer, and more reliable code, at least 4X faster.

HolyC is very similar to regular C, so it's a very simple but powerful language. It was used to make all of TempleOS, so it definitely works to make programs.

Object Pascal is a multi-paradigm, object-oriented, component-based general purpose programming language.
Wolfram Language is a symbolic language, deliberately designed with the breadth and unity needed to develop powerful programs quickly. By integrating high-level forms—like Image, GeoPolygon or Molecule—along with advanced superfunctions—such as ImageIdentify or...
Vala is a new programming language that aims to bring modern programming language features to GNOME developers without imposing any additional runtime requirements and without using a different ABI compared to applications and libraries written in C.
Cobra is a high-performance, rapid-development programming language. It combines features from Python, C#, Objective-C, Eiffel and other languages in order to boost developer productivity.
Cobra is open source under the MIT license.