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Leonardo is an integrated environment for developing and animating C programs. It is not intended to be a professional IDE, but it may be useful for visually debugging C programs and for creating algorithm animations in a declarative style. Leonardo allows you to compile and execute arbitrary C programs on the virtual CPU. Programs can be executed both forward and backward; it is possible to reverse the execution of a program at any time by means of a control tool window.

Leonardo includes a text editor with syntax coloring, a compiler for the ANSI C language, a compiler for the Alpha language, a reversible virtual CPU, a very simple

What's New

Version 3.4.1 adds popup menus in text windows for listing defined C functions and for changing the font size, UNIX-like argc/argv support, fixed some bugs, added new programs to the repository.


PowerPC, System 7.5 or later

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Current Version (3.x)


Downloads 3,866
Version Downloads 1,414
License Free
Date 29 Jul 1999
Platform OS Classic / PPC 32
Price Free