KDevelop is a free integrated development environment (IDE). There is source code navigation and debugging for projects in different programming languages, work with different build and version control systems, and all this is implemented on a modular basis.

KDevelop can analyze code in C, C++ and Javascript/QML, and there are also external modules for PHP and Python.

Colobot (Colonize with Bots) is a game aimed at teaching programming through fun. You play the role of an astronaut traveling with robot assistants in search of a planet to colonize.
The game features real-time 3D graphics and the C++ and Java-like object-oriented language CBOT, which can be used to program the robots available in the game.

игра для детей двух лет, которые ещё не научились использовать клавиатуру.
Ребенок использует мышь для рисования цветных точек и линий на экране

QElectroTech - design (drawing, editing) of electrical circuits. When using it, you can draw a simple electrical or electronic circuit in a few minutes.

It has a large set of functional elements, and you can also create new circuit elements yourself and add them to the library of elements to use later in your projects.

gBrainy - логическая игра, развивающая память, логику, мышление, внимательность и смекалку. Содержит 4 вида игр: логические, математические, на тренировку памяти и на знание смысла и природы слов. Имеет 3 уровня сложности. Расширяется различными головоломками и заданиями с помощью дополнений.

Танграм — это древняя китайская игра-головоломка, в которой игрок должен составить набор фигур из 7 многоугольных частей. Peces позволяет играть в 40 различных модальностей танграма и включает в себя более 31 000 фигур, которые нужно решить. Также это позволяет создавать новые фигурки и соревнования.

Приложение для обучения детей (и взрослых) быстро решать простые арифметические задачи на сложение, вычитание и умножение, и использующее для этого карточки с заданиями и таймер

Scratch is a simple, interactive, collaborative software development environment for creating interactive stories, animations, games, music, and graphics—and publishing them on the Internet. Scratch is designed to help children (ages 8 and up) implement 21st century educational skills. As they create Scratch projects, children learn important math and computer concepts and gain a deeper understanding of the design process.

VisualFBEditor is an IDE for FreeBasic with a visual designer, debugger, project support, etc.
Allows the development of both console and graphical applications for different platforms Linux, Windows, Android.

Code::Blocks is a cross-platform Integrated Development Environment (IDE). It is based on a self-developed plugin framework allowing unlimited extensibility. Most of its functionality is already provided by plugins. Plugins included in the base package are:
* Compiler frontend to many free compilers
* Debugger frontend for GDB
* Source formatter (based on AStyle)
* Wizard to create new C++ classes
* Code-completion / symbols-browser (work in progress)
* Default MIME handler
* Wizard to create new Code::Blocks plugins
* To-do list
* Extensible wizard based on scripts
* Autosave (saves your work in the unfortunate case of a crash)