diagrams.net (draw.io) — The Complete Guide: Free Flowcharts, Schematics and System Diagrams
diagrams.net, also known as draw.io, is a free open diagram tool for flowcharts, P&IDs, networks, electrical and UML. Browser or desktop, no sign-up.
Guides and Articles
GanttProject — The Complete Guide: Free Gantt Charts and Project Schedules
GanttProject is free, open desktop Gantt software: tasks, dependencies, resources and critical path, and it opens MS Project files. Light, with no subscription.
OpenProject — The Complete Guide: Free Engineering Project Management on Your Own Server
OpenProject is open-source team project management: Gantt, tasks, boards, time and documents. The Community Edition is free and runs on your own server.
MuJoCo — The Complete Guide: Fast, Free Physics Simulation for Robotics and Reinforcement Learning
MuJoCo is a fast, accurate open-source physics engine from Google DeepMind: contacts, joints and tendons for robotics, biomechanics and RL, driven from Python.
Webots — The Complete Guide: A Free, Easy-to-Use Robot Simulator for Students and Engineers
Webots is an open-source robot simulator with a friendly interface and a library of ready robots. Write a controller in Python, C or MATLAB and watch it run.
Gazebo — The Complete Guide: Free Simulation of Robots, Sensors and Environments
Gazebo is an open-source robotics simulator with physics, sensors and 3D worlds. Test control and navigation code before building hardware, fully tied to ROS 2.
FreeFileSync — The Complete Guide: Free Backup and Sync of Project Folders
FreeFileSync compares folders and copies only what changed: regular backups of project folders to a drive or server, and an up-to-date copy on your laptop.
Typst — The Complete Guide: Technical Reports and Equations, Simpler Than LaTeX
Typst is a new typesetting system for technical documents: simple syntax, instant compiling and LaTeX-quality equations. Templates, tables and references.
THERM — The Complete Guide: Free Thermal Bridge and Heat Transfer Analysis of Building Details
THERM from Berkeley Lab computes 2D heat flow in building details: window frames, wall-slab junctions and thermal bridges, with U-factors and surface temps.
SU2 — The Complete Guide: Free, Open-Source CFD and Aerodynamic Optimisation
SU2 is an open-source CFD solver from Stanford, strong in compressible flow and adjoint shape optimisation. When to choose it, and how it compares to OpenFOAM.
FreeFEM — The Complete Guide: Free Finite Element Solving of Partial Differential Equations
FreeFEM is a free language for solving PDEs with finite elements: write the weak form almost as on paper. For research, teaching and problems no tool covers.
LinuxCNC — The Complete Guide: Free, Open-Source CNC Machine Control
LinuxCNC is an open-source CNC controller for mills, lathes, plasma cutters and robots: real-time control, kinematics, G-code and toolpath preview.