b3log.org
SiYuan is an open-source, local-first, privacy-first note-taking app. It offers Markdown, block references, bidirectional links, databases, and multi-device sync for personal knowledge management. Content is organized at the block level, with built-in block-level and span-level elements, and blocks support zoom-in focus with breadcrumb navigation. A free tier includes local storage; PRO features require a one-time purchase and third-party sync services.
