KediCAD is a 2D analogue of AutoCAD.

This program has a simulation feature that allows you to make expected changes to general drawings.

KediCAD can also be used to create a drawing of the moment of inertial calculations and calculation of bends.

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KAlgebra является алгебраической графический калькулятор с поддержкой 3D-графики и MathML языка разметки

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.

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.

IDLE is an Integrated Development Environment for Python.
IDLE is written using Tkinter and is therefore available on different operating systems.

BRL-CAD is a powerful cross-platform Open Source combinatorial Constructive Solid Geometry (CSG) solid modeling system that includes interactive 3D solid geometry editing, high-performance ray-tracing support for rendering and geometric analysis, network-distributed framebuffer support, image and signal-processing tools, path-tracing and photon mapping support for realistic image synthesis, a system performance analysis benchmark suite, an embedded scripting interface, and libraries for robust high-performance geometric representation and analysis.

Xojo является средой кросс-платформенной быстрой разработки (RAD), которая позволяет простым людям создавать сложное программное обеспечение (приложения, игры) для разных платформ ориентации Mac OS X, Microsoft Windows, Linux x86, IOS, Web, а также Raspberry Pi.

With Stellarium, you can enter the coordinates of any point on Earth and see the night sky at any given time. The application is so accurate that it is used in many planetariums. The Stellarium application is not intended for high-precision calculations or prediction of eclipses based on the ephemeris principle. However, it is ideal for preparing to observe the sky with the naked eye, using binoculars or a small telescope

Графический пользовательский интерфейс для шахмат во всех его основных форм, в том числе международных шахмат, Xiangqi (китайские шахматы) и Сеги (японские шахматы), в дополнение ко многим несовершеннолетним такие варианты, как и негативных шахматы, Крейзихаус, Chess960 и Capabanca шахматы. Она отображает шахматную доску на экране, принимает сделанных ходов с помощью мыши, и нагрузок, и сохраняет в портативных игр Game Notation (PGN)

Thonny is a simple Python IDE with features useful for learning programming.

It comes with a debugger which is able to visualize all the conceptual steps taken to run a Python program (executing statements, evaluating expressions, maintaining the call stack). There is a GUI for installing 3rd party packages and special mode for learning about references.