SIMPL is a free programming language and IDE built on a simple idea: pseudocode — the plain, readable code people use to sketch algorithms — should be able to run. Write IF…THEN, FOR…NEXT and WHILE the way you'd write them on paper, press Run, and see the result.
It's designed for three kinds of users:
- Computer Science students: it runs the official Cambridge pseudocode (IGCSE, O Level, AS & A Level) exactly as written in the exam, and its Cambridge strict mode flags anything that goes beyond the guide.
- Complete beginners: code that reads almost like English, error messages in plain words that point to the line and explain what to fix, and a built-in 31-chapter manual that teaches programming from zero, with exercises and worked solutions.
- Curious programmers: a small, complete language with the spirit of the 80s home computer — type, run, and draw on screen minutes later.
Beyond pseudocode, SIMPL adds graphics and animation (CANVAS), sound and music (SOUND), modules and a standard library (IMPORT). It comes with two complete programs written in SIMPL itself, commented line by line: a falling-block game and a 1980s-style BASIC interpreter.
The IDE includes syntax highlighting, an interactive console, a step-by-step debugger with breakpoints and a live view of every variable, and light and dark themes. The manual opens with F1 beside the code, and every example can be opened in the editor with one click.
Free, portable (nothing to install) and fully offline. Available for Windows 10/11 and Linux (64-bit).
EU
Alessandro Costa 
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