evolus/pencil
The Pencil Project's unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use. observed · 2026-08-28
Health v2 · maintenance only
61/100
- Activity 85
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 4458
- days_rel: n/a
- days_push: 92
- n_releases_24m: 0
Adoption not part of the score
9859 stars · 790 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Pencil is a free, open-source desktop application for GUI prototyping and diagram drawing, built on Electron. It ships with built-in shape collections for desktop, web, Android, and iOS UI mockups, plus flowchart shapes and export to PNG, PDF, SVG, and web pages.
Use cases
- create wireframes for a web app
- prototype mobile app UI mockups
- draw flowcharts and diagrams
- export mockups to PDF or PNG
- sketch desktop application interfaces
- build clickable UI prototypes for free
When to choose
- you need a free, cross-platform wireframing/prototyping tool
- you want built-in Android/iOS/desktop UI stencils
- you prefer offline desktop tools over web-based design apps
- you need simple diagram drawing with connector support
When to avoid
- you need real-time team collaboration on designs
- you need high-fidelity interactive prototypes with animations
- you want a plugin ecosystem comparable to Figma or Sketch
- development pace is slow; cutting-edge features may be lacking
Facets
application · maturity maintenance
gui graphics documentation web-design developer-tools graphics cross-platform cross-platform windows wireframing prototyping mockups diagramming ui-design stencils pdf-export electron macos linux nodejs
3 sources
- readme: https://github.com/evolus/pencil · fetched 2026-08-28 · ea30d3f27d57
- homepage: http://pencil.evolus.vn · fetched 2026-08-29 · b60bb3b70fcd
- site_page: http://pencil.evolus.vn/Features.html · fetched 2026-08-29 · 9ddc9ce5c8bc
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| evolus/pencil | main | 61 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem