Pencil Project Alternatives
Pencil Project is described as 'Pencil is a standalone app or Firefox extension* that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features' and is a well-known app in the Web Browsers category. There are more than 50 alternatives to Pencil Project for a variety of platforms, including Windows, Mac, Online / Web-based, Linux and Android. The best alternative is diagrams.net, which is both free and Open Source. Other great apps like Pencil Project are Figma (Freemium), LibreOffice - Draw (Free, Open Source), Sketch (Paid) and Microsoft Office Visio (Paid).