Engineering, together
20 free, hand-picked resources to keep learning and building — all external links.
Former NASA engineer doing huge, fun builds.
Beautifully told stories behind engineering.
Civil and infrastructure, explained hands-on.
How everyday and complex tech actually works.
Clear engineering animations and breakdowns.
Cloud CAD — free for personal projects.
Open-source parametric 3D CAD.
Drag-and-drop 3D design and circuits — great for beginners.
Professional CAD/CAM, free for hobbyists.
Open-source PCB / electronics design.
Online engineering courses — free to audit.
Math and physics foundations, free forever.
Online courses, free to audit.
Free Indian engineering videos, all disciplines.
Look up material properties, formulas, constants.
A computational engine for checking your math.
Free, open-access textbooks (physics, math).
Step-by-step project guides from makers.
Computer engineering and CS reference.