Penpot

Balsamiq is a low-fidelity wireframing tool designed to replicate the experience of sketching on a whiteboard. The software focuses on the early stages of design, allowing product managers, developers, and UX designers to create rapid prototypes and user interface blueprints. By utilizing a hand-drawn, sketch-style visual aesthetic, the platform prioritizes structural layout and user flow over high-fidelity visual design details.

Moqups is a cloud-based web application designed for creating wireframes, mockups, diagrams, and prototypes. The platform integrates a visual ecosystem where product managers, UX/UI designers, and developers can map out user flows, design web or mobile app blueprints, and build interactive UI prototypes. It features built-in stencils and icon libraries alongside real-time multi-user collaboration functionality.

Sketch is a digital design platform and UX/UI design tool built primarily for macOS. The software functions as a vector graphics editor for creating user interfaces, mobile apps, and websites. It includes built-in features for interactive prototyping, design systems management, and real-time team collaboration, alongside developer handoff software to transition designs into production.