This release introduced several enhancements and stability fixes: Pencil Project Intro Brief Tutorial

Available as a standard installer package (typically for Windows 7 and later).

Available as a Universal .dmg supporting both Intel and Apple Silicon . Linux: Provided in .deb (Ubuntu) and .rpm (Fedora) formats.

The is a free, open-source GUI prototyping and wireframing tool. This version is a significant stable release built on the Electron runtime, designed to help developers and designers create mockups for desktop, web, and mobile platforms quickly. How to Download Pencil Project 3.1.0