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While JSON is probably the most popular format for exchanging data, JSON Schema is the vocabulary that enables JSON data consistency, validity, and interoperability at scale.
Schema.org is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond.
Schema.org vocabulary can be used with many different encodings, including RDFa, Microdata and JSON-LD. These vocabularies cover entities, relationships between entities and actions, and can easily be extended through a well-documented extension model. Over 10 million sites use Schema.org to markup their web pages and email messages. Many applications from Google, Microsoft, Pinterest, Yandex and others already use these vocabularies to power rich, extensible experiences.
Online database diagram editor and SQL generator. Free, simple, and intuitive online database design tool and SQL generator.
DrawDB is a robust and user-friendly database entity relationship (DBER) editor right in your browser. Build diagrams with a few clicks, export sql scripts, customize your editor, and more without creating an account.
Open-source database schema management tool. manage your database schema as code.
Atlas is a language-agnostic tool for managing and migrating database schemas using modern DevOps principles.
schema is a command line tool part of the API Platform framework that instantly generates a set of PHP classes from RDF vocabularies such as (but not limited to) Schema.org or ActivityStreams. Alternatively, it can generate PHP classes from an OpenAPI documentation.
Free database schema discovery and comprehension tool.
A tiny little drawing app. Allow to easily create simple diagrams.
DBML (Database Markup Language) is an open-source DSL language designed to define and document database schemas and structures. It is designed to be simple, consistent and highly-readable.