Balsamiq vs Pencil: What are the differences?
What is Balsamiq? Rapid wireframing tool that helps you work faster & smarter. Balsamiq Mockups is a web tool that allows users to mock up different designs and ideas quickly and easily. Balsamic Mockups is similar to drawing mockups, but it is digital.
What is Pencil? A Microframework Inspired by Flask for Rust. A web application microframework for Rust.
Balsamiq belongs to "Wireframing" category of the tech stack, while Pencil can be primarily classified under "Microframeworks (Backend)".
Pencil is an open source tool with 872 GitHub stars and 42 GitHub forks. Here's a link to Pencil's open source repository on GitHub.