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Pencil: open-source GUI prototyping tool

pencil.evolus.vn Software & code Software projects Design & creativity Class of 2021-05 Hall of Fame
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Resurfaced independently across 5 calendar years, with breakout response in 2 of them.

submissions
6
submitters
6
observed span
2013–2023
peak thread · 79 comments
320 pts
latest 20+ return · 2023-03-01
72 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

The original project is abandoned, but a recently updated fork is available at github.com/prikhi/pencil. I prefer Pencil to more commonly referenced options like Balsamiq. Looks like no commits in a few months, but hopefully the form is still going. An open source UX tool focused on software application workflow prototyping rather than GUI layout is an asset to the software development community.

mch82·320-point thread·

Penpot is really amazing https://penpot.app Similar to Sketch or Figma but Open Source https://github.com/penpot/penpot Have a try if you haven't! I wish one day I could replace my Figma workflows

This was a great option a few years ago, but I wouldn't recommend this. It seems stagnated, based on legacy infrastructure, doesn't really fit into modern UI usage patterns anymore, and doesn't collaborate easily. At some point I thought they would overtake a combination of Gliffy and StarUML, but right now even draw.io is a better option.

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
578

reference only — not used in Hall rules or ranking

Total comments
129

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2013-03-01Pencil - FOSS Mockup Tool (Mac/Win/Lin)tylermauthe30
2013-04-15Pencil Project, a free GUI prototyping tool that's available for all platforms.dous10
2014-04-17Pencil: A cross-platform open source GUI prototyping tooladefa20
2016-11-07Pencil: open-source GUI prototyping toolFirst breakout · Best threadcheiVia032079
2021-05-05Pencil Project – open-source GUI prototyping toolHall inductionpabs318034
2023-03-01Pencil ­– an open-source GUI prototyping toolLatest 20+ point returnapp4soft7216