List of the Top 7 Prototyping Software for Linux in 2025

Lunacy is an advanced vector graphic application designed for UI/UX and web design, boasting impressive speed compared to Figma and enhanced intelligence over Sketch. It's completely free to use for both personal and commercial projects, allowing users to access its full range of features without any cost. The application is cross-platform, seamlessly functioning on Windows, macOS, and Linux systems. With real-time collaboration capabilities, users can effortlessly work together on the same design, regardless of their operating platform. Lunacy has low system requirements, making it accessible for users with moderate laptops to run the software smoothly without performance issues. It comes equipped with an impressive array of built-in graphics, including icons, photos, and illustrations to elevate design projects. Additionally, the app offers a suite of AI-powered tools such as a background remover, image upscaler, avatar generator, and text generator, enhancing the creative process. Users have the flexibility to work both online and offline, choosing between cloud and local documents, with the ability to switch modes as needed. For those familiar with Sketch or Figma, Lunacy offers a minimal learning curve, allowing for a smooth transition into its interface. It fully supports Sketch files, enabling users to open, edit, and save their work without hassle. Thanks to its native compatibility with the Sketch format, Lunacy integrates well with popular hand-off and version control tools like Avocode, Zeplin, Abstract, and Simpli, providing a comprehensive design experience. If needed, users can also easily import .sketch files into Figma or Adobe XD, ensuring versatility in their design workflow. This makes Lunacy not only a powerful design tool but also a flexible solution for teams looking to streamline their collaborative efforts in the creative process.

Omnis Studio serves as a versatile environment for developing applications across different platforms. With this tool, developers can write their application code just once, enabling them to launch their creations on a multitude of devices and platforms, including desktop computers running Windows and macOS, as well as mobile devices on iOS and Android. The Omnis JavaScript Client is particularly noteworthy for its compatibility with a variety of client devices, utilizing a robust JavaScript framework that allows the application's user interface and web pages to be displayed seamlessly in standard web browsers, whether on desktops or mobile devices. Additionally, Omnis Studio facilitates data and service integration through RESTful Web Services, while its comprehensive API empowers users to enhance the platform's capabilities with custom external components. Headquartered in the UK, Omnis operates with subsidiaries in both the USA and France, and it also collaborates with distributors in various other regions to expand its reach. This global presence helps ensure that developers from different parts of the world can access and utilize the powerful features of Omnis Studio.

Simitless empowers you to create a customized information system tailored to your needs without the necessity of coding. Collaborate effortlessly on your database and information system, configuring it in real-time to meet your requirements. Begin with one of our extensive library of templates and modify it according to your preferences. This approach ensures that you can maintain your workflow without adapting to a rigid software structure. Enhance your operations, gain valuable insights, and watch your business flourish.

Appsmith serves as an open-source low-code platform designed for the creation of personalized applications and internal tools. It features a user-friendly drag-and-drop interface, providing users the capability to seamlessly integrate databases and APIs. Moreover, it facilitates effortless sharing and collaboration among team members. You can develop various components such as dashboards, admin panels, CRUD applications, and forms, enhancing their dynamism and strength by incorporating custom logic through JavaScript. This versatility makes Appsmith a valuable asset for teams looking to streamline their development processes.

Storyboard is a sophisticated embedded GUI framework designed to enhance the design and delivery of modern user experiences for next-generation IoT devices and wearables. By leveraging Iteration Technology and Rapid Design Import, embedded developers can create products that deliver exceptional graphical and voice-based GUI experiences, while ensuring compatibility across various operating systems and platforms. Moreover, Storyboard fosters collaboration between embedded developers and designers through integration with widely used tools like Sketch and Photoshop. This synergy enables manufacturers to achieve superior user experiences without sacrificing performance or extending development timelines. With Storyboard, developers can swiftly visualize modifications, allowing them to promptly accept or reject design elements. Consequently, this agile workflow accelerates the product development process, empowering teams to refine and enhance their products at any point in the development cycle, ultimately leading to a more efficient and effective creation process.

MockFrame, offered by 500apps, is a versatile wireframing tool designed for the creation of mockups, prototypes, and user interfaces. This online software enables users to design websites or applications without the need for coding skills. You can easily share your designs with clients to receive valuable feedback on your projects. Additionally, MockFrame comes bundled with over 37 applications for a monthly fee of just $14.99, making it a cost-effective solution for designers. This comprehensive offering is perfect for anyone looking to streamline their design process.

Your design approach transcends a fixed internal data structure that necessitates a code export, allowing for dynamic code modification in real-time, which simplifies file exchanges between designers and developers. By harnessing the power of the Web Platform, crafting distinctive and adaptive layouts becomes a straightforward task with no constraints. Our grid tool is recognized as the most user-friendly and effective grid system on the market. Thanks to our intuitive graphical user interface, coding is not a prerequisite for the design workflow; however, you still produce code that can be fine-tuned by you and your developer partners whenever necessary. This collaborative framework opens up vast avenues for creativity in your joint projects. Every aspect—from colors and sizes to fonts and margins—will be displayed exactly as intended for the end-users, removing any guesswork for developers regarding the designer's intent. Ultimately, this cohesive integration guarantees that your projects are carried out with both clarity and accuracy, promoting a more streamlined and productive workflow for all participants. This innovative approach not only enhances collaboration but also empowers teams to push the boundaries of design and functionality.