Project Summary
The Pencil Project's unique mission is to build a multi-platform free and opensource tool for making diagrams and GUI prototyping that everyone can use.
Builds are available for Windows, Mac, Linux, and as a Firefox extension
Project was originally sponsored by a Viatnamese site, Evolus, with code on googecode. That has not been updated since 2013, and new builds are occurring on an actively maintained fork on github.
In a Nutshell, The Pencil Project...
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took an estimated 36 years of effort (COCOMO model)
starting with its first commit in June, 2014
ending with its most recent commit about 1 year ago
Quick Reference
GNU General Public License v2.0 or later
Permitted
Commercial Use
Modify
Distribute
Place Warranty
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
There are no reported vulnerabilities
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummarySep 27 2025 — Oct 27 2025
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12 Month SummaryOct 27 2024 — Oct 27 2025
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