Alexandrie

Obsidian is a note-taking and personal knowledge management application by Obsidian.md that stores notes as local Markdown files. It provides features for linking notes (backlinks), a graph view, and a plugin system for extensibility across desktop and mobile.

NoteDiscovery is a lightweight, self-hosted knowledge-base and note-taking application developed by Gamosoft. It stores notes as plain Markdown files in folders on the user's server and provides search, navigation, graph views of connected notes, an outline panel, favorites, themes, plugins, LaTeX/MathJax, HTML export, printing, responsive desktop, tablet, and mobile interfaces, and an in-app drawing editor that saves sketches as PNG files alongside notes. The application serves its browser libraries locally without requiring a CDN, allowing operation on air-gapped networks. It can be deployed with optional password authentication and Docker, and includes a built-in Model Context Protocol (MCP) server for compatible assistants such as Claude and Cursor. Through the MCP integration, assistants can search, create, edit, move, tag, and append to notes and explore connections between them.

WeKnora is an open-source, LLM-powered knowledge platform from Tencent for turning documents into queryable knowledge bases, retrieval-augmented Q&A, autonomous reasoning workflows, and self-maintaining Markdown wikis. It supports RAG-based quick Q&A and a ReAct agent that orchestrates retrieval, MCP tools, sandbox skills, and web search for multi-step tasks. Its Wiki Mode distills source documents into structured, interlinked Markdown pages with an interactive knowledge graph, manual editing, revision history, line-level diffs, and rollback. The platform ingests formats including PDF, Word, Markdown, HTML, images, spreadsheets, presentations, and XMind, and can synchronize sources such as Feishu, GitLab, Tencent IMA, Notion, Yuque, and RSS. Its modular pipeline supports interchangeable parsers, LLMs, embedding providers, vector databases, and storage backends, with dense, sparse, hybrid, parent-child, and graph-based retrieval strategies. WeKnora provides a web interface, REST API, command-line client, MCP server, website embed widget, and integrations with messaging channels. It can be deployed locally, with Docker, or on Kubernetes, including private and offline deployments. The repository states that it is licensed under the MIT License and supports workspace RBAC, scoped API keys, audit logs, and Langfuse-based observability.

NotionNext is an open-source website system built with Next.js and the Notion API. It uses a Notion workspace as the source for articles, categories, tags, menus, and pages, then publishes that content as blogs, portfolios, knowledge bases, navigation sites, product websites, and other searchable sites. The repository supports theme-based customization and deployment on platforms such as Vercel without a self-hosted server, with features including custom domains, SEO, sitemaps, RSS, comments, analytics, search, advertising, and email subscriptions. It is maintained by the notionnext-org GitHub organization and is released under the MIT License.