Scapple Alternatives for Linux

Lucidchart is a leading web-based diagramming software that empowers individuals and teams to create complex visual representations of ideas, systems, and processes. It offers extensive shape libraries, real-time collaboration features, and seamless integration with popular productivity tools, making it ideal for flowcharts, UML diagrams, wireframes, and more.

FreeMind is a robust, open-source, and free mind mapping software written in Java. It's a versatile tool for brainstorming, organizing thoughts, managing projects, and structuring knowledge hierarchically, providing a flexible canvas for visual thinking.

Pencil Project is a free and open-source GUI prototyping tool that helps designers and developers create wireframes and mockups easily. Available as a standalone application and a Firefox extension, it offers a wide range of built-in shapes and templates for various platforms.

Freeplane is a powerful and free mind mapping software that allows users to organize ideas, create outlines, and manage information in a hierarchical structure. It leverages the power of visual organization to facilitate brainstorming, project planning, and knowledge management.

Mindomo is a versatile online mind mapping software that helps users organize thoughts, collaborate on projects, and deliver dynamic presentations. It offers a rich set of features for brainstorming, planning, and visualizing information.

SuperNotecard is a comprehensive writing tool designed to assist writers of fiction and nonfiction. It provides a dynamic environment for organizing notes, brainstorming ideas, managing characters, and structuring narratives through familiar paradigms like notecards and outlines, aiming to enhance productivity and creativity.