Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.
Cost / License
- Free
- Open Source (GPL-2.0)
Application types
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux
- PortableApps.com




There are many alternatives to HotGloo for Linux if you are looking for a replacement. The best Linux alternative is Pencil Project, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 50 alternatives to HotGloo and 13 are available for Linux so hopefully you can find a suitable replacement. Other interesting Linux alternatives to HotGloo are Frame0, mydraft.cc, quickMockup and WireframeSketcher.
Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.









Online tool for creating mockups in the browser. Use your browser’s save function to save the file (just html for view only, complete save for an editable version) or export to codepen for others to view.

WireframeSketcher is a software tool that helps product managers, designers and developers quickly create wireframes, mockups and prototypes for desktop, web and mobile applications. It’s standalone software and a plug-in for any Eclipse IDE.




ReacType is a visual prototyping tool for developers employing React component architecture alongside the comprehensive type checking of TypeScript. In other words, you can draw prototypes and export React / Typescript code!




All in One Prototyping Tool For Vue Developers. From Component Architecture to Code Exporting.

UXPin is a web-based system for managing design documents like wireframes, sitemaps, persona descriptions or flowcharts. It lets you upload image files, invite teammates to review and comment on them, and keep track of revisions.



FlairBuilder is a user interface prototyping tool for easy authoring of interactive website wireframes, mockups and GUI prototypes.

MockupTiger is a web based application that helps you to build fluid wireframes, mockups or prototypes for your next web application or desktop software.

EaSynth ForeUI is an easy-to-use UI prototyping tool. You can use ForeUI to create skinnable prototype of software or website, and run the interactive simulation in your web browser. You can switch the UI theme of the prototype, thus the fidelity will be changed as well.



Mock with real html components, prototype with draggable puzzle pieces & share in any browser. Collaborate through threaded comments per component + full group chat.

