Open Source Flowchart Software

mermaid is a JavaScript-based diagram and flowchart generating tool that uses markdown-inspired text for fast and easy generation of diagrams and charts. Forget about using heavy tools to explain your code. mermaid greatly simplifies documentation with its simple markdown-like script language, and offers a great range of diagram and chart options. The latest version of mermaid comes with a number of bug fixes and enhancements, as well as a new diagram type, entity relationship diagrams. Its range of available diagrams include flowcharts, sequence diagrams, gantt diagrams and more, with new ones continuously being developed.

Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms. The latest stable version of Pencil is 3.1.0 which contains stability fixes and many new features. More details can befound in the releaste notes. Pencil provides various built-in shapes collection for drawing different types of user interface ranging from desktop to mobile platforms. Starting from 2.0.2, Pencil is shipped with Android and iOS UI stencils pre-installed. This makes it even easier to start protyping apps with a simple installation. Starting from 2.0.2 Pencil has even more shape collections included by default. The list of built-in collections now includes general-purpose shapes, flowchart elements, desktop/web UI shapes, Android and iOS GUI shapes.

Free Java Flowchart simulator / interpreter

JLink lets users author flow charts based on ISO 5807 and IBM standards. Developers can use JLink to add flowcharts to applications, serve a flow chart over the web in PDF or PNG, or dynamically create a flowchart with Javascript, Python or Ruby scripts

devFlowCharter is a complete environment for creating program flowchart, source code generation, and compilation. Its main goal is to be straightforward, educational tool for use during procedural programming classes.

small & symple disassembler, resource unpacker and flowchart graphical editor

Aqueduct is a simple state machine library written in Java. Some programs can be described naturally as a state machine or a flowchart; this library is intended to simplify the development of such programs.

This is a small program that shows flowchart from C source code . This program may help the user analyze C/C++ source and Assembly(x86,PIC MCU(16fxx,24fxx))code by navigating the flowcharts.

FAST(Flowchart Abstract Syntax Tree) SDK is a development toolkit built upon Eclipse RCP and GEF to visualize the process of converting unstructured flowcharts in to structured ones.

FC Designer is a standalone flowchart designer written in Java.