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Logisim-evolution 4.0.0 is an open-source digital logic design tool and simulator maintained by the logisim-evolution developers, offering educators, students, and hobbyists a graphical environment for drawing and testing circuits ranging from simple gates to complete CPUs. Originally created by Carl Burch and now continued as a community-driven fork, the program provides a library of over 200 components—basic gates, multiplexers, ALUs, memory elements, and even VGA outputs—whose behavior can be inspected in real time through interactive timing diagrams and oscilloscope-style views. Typical classroom use includes verifying Boolean algebra identities, constructing finite-state machines, exploring pipeline hazards, or prototyping the datapath and control units of a RISC processor before moving to HDL synthesis. Beyond teaching, the simulator’s hierarchical sub-circuit support and VHDL export make it suitable for quick proof-of-concept validation of custom peripherals or for documenting legacy board-level designs when original CAD files are lost. Released under the GPL, the project has evolved through three major public versions that progressively added support for 64-bit systems, dark themes, Unicode component labels, and scripting via JavaScript, while preserving backward file compatibility so circuits authored a decade ago still open cleanly. Users can run the cross-platform jar directly or install the Windows-specific build that associates .circ files with the application and enables command-line batch testing of digital coursework. Logisim-evolution is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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