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  1. Python is an interpreted, interactive, object-oriented, extensible programming language. It provides an extraordinary combination of clarity and versatility, and is free and comprehensively ported.

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  2. Lazarus is a cross-platform IDE for the Free Pascal compiler. It tries to offer a Delphi-like programming experience through its own 'Lazarus Component Library' and supporting many platforms like Windows, OSX, Linux, BSD, Android, iOS and more.

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    Running on Windows


  3. Kotlin is a cross-platform, statically typed, general-purpose programming language with type inference.

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  4. Cross platform development tools for native iOS, Android, desktop and server applications.

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    IDE screenshot
  5. Glade icon
    • FreeOpen Source
    • Mac
    • Windows
    • Linux

    Glade is a RAD (Rapid Application Development) tool to enable quick & easy development of user interfaces for the GTK+ toolkit.

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    Discontinued

    The tool is not developed anymore as it cannot handle Gtk4.Instead Cambalache UI Maker is being developed but it still needs funding.

    Login ui using glade
  6. Piano From Above (PianoFromAbove.exe). Piano From Above is a program that turns learning the piano into a videogame. You can open any MIDI file and simply play the notes as they fall.

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  7. Embarcadero Delphi, formerly CodeGear Delphi and Borland Delphi, is a software development environment for Microsoft Windows applications originally developed by Borland and now owned and developed by Embarcadero Technologies.

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    Delphi 10.3 Rio - Visual designer
  8. Basic4android is Simple and powerful RAD tool for developing native Android applications without time-consuming Java / Eclipse programming .

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  9. Jmix provides powerful full stack architecture along with Rapid Application Development tools for easy start and fast development of modern business web applications.

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  10. Ultimate++, also called U++, is a C++ cross-platform rapid application development framework focused on programmers productivity. It includes a set of libraries (GUI, SQL, etc..), and an integrated development environment.

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  11. Planet Crust's Low-Code Platform is a free and open-source low-code tool that allows you to create your own applications with ease. It features an intuitive drag and drop page builder, advanced reporting, access and privacy features, and automation.

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    Planet Crust's 100% open source low-code platform.
  12. React Studio lets you create components either visually or in code, then use them interchangeably in your designs.

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  13. Asp.net is an open source server-side Web application framework designed for Web development to produce dynamic Web pages, web sites, apps and services with HTML, CSS and JavaScript. You can also create Web APIs, mobile sites, use real-time technologies like Web Sockets and more!

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  14. Tcl (originally from "Tool Command Language", but conventionally rendered as "Tcl" rather than "TCL"; pronounced as "tickle" or "tee-see-ell") is a scripting language created by John Ousterhout.

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  15. CodeTyphon is a fork/distribution of Lazarus with thousands of Lazarus/Free Pascal components bundled into distribution and with own Lazarus expansion features.

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    CodeTyphon running on Windows 10