The Open Context Layer for Data and AI , OpenMetadata is the open platform for building trusted data context and business semantics for humans, AI assistants, and agents.

First open-source data discovery and observability platform. We make a life for data practitioners easy so you can focus on your business.

📙 Awesome Data Catalogs and Observability Platforms.

BookOrbit: Your Reading Space

Egeria core

GeoNetwork is a catalog application to manage spatially referenced resources. It provides powerful metadata editing and search functions as well as an interactive web map viewer. It is currently used in numerous Spatial Data Infrastructure initiatives across the world.

qData is an open-source data governance and data development platform that integrates ETL, data development, metadata management, data quality, data assets, API services, and AI-powered data Q&A.

BookLore: A self-hosted, multi-user digital library with smart shelves, auto metadata, Kobo & KOReader sync, BookDrop imports, OPDS support, and a built-in reader for EPUB, PDF, and comics.

Must-read Papers for File System (FS)

PhotoStructure for Servers

Geoportal Server is a standards-based, open source product that enables discovery and use of geospatial resources including data and services.

📸 Smart Google Photos organizer! Clean files, extract dates, embed metadata, sort by date, generate reports. Supports 50+ formats including RAW.

An audiobook library cleanup and management tool built with Python and Django. Leveraging m4b-merge for audiobook standardization and editing. Ideal for enhancing audiobook library management.

Relational Workflows: where database schemas define executable data pipelines.

ODD Specification is a universal open standard for collecting metadata.

Stream Discovery and Stream Orchestration

An OSINT Metadata analyzing tool that filters through tags and creates reports

The Data Product Descriptor Specification (DPDS) Repository

Self-hosted web app for browsing, playing, and editing music file metadata. Features a three-panel UI to navigate your library, listen to tracks, and write tag changes directly back to audio files. Built with Next.js, React, Prisma + SQLite, and node-taglib-sharp.

Sample code with integration between Data Catalog and RDBMS data sources.