Obsidian

Obsidian is a free and flexible application designed for private thoughts. It is intended for individuals who want to capture, organize, and connect ideas, as described through features like evergreen notes, a graph view, and backlinking. The product offers several key capabilities: it allows users to sync data securely across devices, publish content instantly, and extend functionality through plugins. It also includes a web clipper for saving content from the internet. Obsidian is available on multiple platforms, including Windows, and supports a range of languages such as English, Arabic, German, Spanish, French, Italian, Japanese, Korean, Portuguese, Russian, and Chinese. The application is positioned for tasks like writing, project planning, travel organization, and maintaining personal knowledge bases, as illustrated by example notes on writing, health, books, and travel itineraries. Pricing details are not specified in the source material, but the app is described as free, with additional paid services for Sync and Publish.