Apps similar to MockupTiger include LibreOffice - Draw, which is free and open source. Other options are Dia, yEd Graph Editor, Pencil Project and Freeplane. Prototyping Tools like MockupTiger are a crowded field, with more than 50 alternatives for Windows, Mac, the web, Linux and iPhone.
UMLet is an open-source UML tool with a simple user interface: draw UML diagrams fast, export diagrams to eps, pdf, jpg, svg, and clipboard, share diagrams using Eclipse, and create new, custom UML elements.
Lightweight UML modeling tool with built-in AI features (AI Chat Copilot, AI Code Reverse and an MCP server).
Japan
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.
Germany
EU
Cacoo is a user-friendly online diagramming tool that allows you to create a variety of diagrams such as wireframes, flowcharts, UML diagrams, network diagrams, mindmaps, sitemaps, database diagrams, and more.
United States
Web-based diagram platform offers real-time teamwork, 50+ diagram and mind mapping types, technical wireframing, smart objects, templates, version control, secure cloud storage, PDF export, collaboration tools, commenting, and integration for business and education use.
Australia
Justinmind is the best solution to prototype any web or mobile app you can think of. You can define websites and apps for Web, iOS, and Android with our intuitive drag-and-drop interface. No code involved.
SpainEU
Graphical modelling open source UML2 tool based on Eclipse environment.
United States
ProcessMaker is a cost effective and easy to use open source business process management (BPM) or workflow software application.
United States
"If they could see what Im thinking, they'd get it!" People just understand faster with pictures. It helps them see how information is connected, whether it is complete, and how a shift in one element impacts something else.
United States
Diagramo is an online flowchart software
United States
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.
DenmarkEU
MockFlow accelerates early-stage product design and ideation with AI-powered wireframing, prototyping, and visual brainstorming. WireframePro and IdeaBoard enable teams to collaboratively transform initial concepts into professional, shareable wireframes and diagrams.
India
