# leozide/leocad

A CAD application for creating virtual LEGO models

Repository: https://github.com/leozide/leocad
Canonical: https://ross.abutalabs.com/products/leocad
Homepage: https://www.leocad.org
Language: C++
License Family: other
Topics: lego-cad, ldraw, lego, cad, linux, macos, windows
Last push: 2026-08-24T05:10:19+00:00

## Health v2 (maintenance only)
Score: 69/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 13, longevity 100
- inputs: {"age_days": 3640, "days_push": 9, "days_rel": 366, "gap_med": null, "n_releases_24m": 1}
- flags: no_license, no_readme
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2844, forks 257 (observed 2026-08-28T04:07:24.853356+00:00)

## What it is
LeoCAD is an open-source CAD application for designing virtual LEGO models using the LDraw parts library. It runs natively on Windows, Linux, and macOS and reads/writes LDR and MPD files.

## Use cases
- design virtual lego models on my computer
- create lego building instructions with steps
- open and edit ldraw ldr files
- build large lego models with thousands of pieces
- share lego models with the ldraw community

## When to choose
- you want a free, open-source LEGO CAD tool
- you need LDraw standard compatibility and parts library
- you work across Windows, Linux, or macOS

## When to avoid
- you need general-purpose mechanical CAD
- you require official LEGO software or support
- you need parametric 3D printing CAD features

## Facets
- artifact type: application
- maturity: active
- function: gui, graphics, simulation, file-system
- domain: graphics, desktop-applications, gaming-tools, cross-platform
- platform: windows, cross-platform
- tags: lego, ldraw, cad, 3d-modeling, virtual-bricks, linux, macos, desktop

## Member repositories
- leozide/leocad (main) score 69

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:24.853356+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:37:05.713922+00:00, confidence not recorded.
  - homepage: https://www.leocad.org (fetched 2026-08-29T09:52:41.212644+00:00, sha 404f78c06c20)
  - site_page: https://www.leocad.org/docs/start.html (fetched 2026-08-29T09:52:41.221935+00:00, sha 9b7d005c2e1c)
- Data as of 2026-08-30T08:39:29.467469+00:00.