CrateDB is a distributed and scalable SQL database for storing and analyzing massive amounts of data in near real-time, even with complex queries. It is PostgreSQL-compatible, and based on Lucene.

A OPC UA gateway which gives you access to your OPC UA values via MQTT or GraphQL (HTTP). If you have an OPC UA server in your PLC, or a SCADA system with an OPC UA server, you can query data from there via MQTT and GraphQL (HTTP). In addition, the gateway can also log value changes from OPC UA nodes in an InfluxDB, IoTDB, Kafka, and others.

Python DB API client library for CrateDB, using HTTP.

A JavaScript guestbook app with a number of different backend implementations, each using a different client library to communicate with CrateDB.

CrateDB Prometheus Adapter.

Crash is an interactive CrateDB command line interface (CLI) SQL shell with autocompletion.

CLI collection of utilities for working with CrateDB or PostgreSQL. Benchmark queries, insert data.

QuantumLeap: a FIWARE Generic Enabler to support the usage of NGSIv2 (and NGSI-LD experimentally) data in time-series databases

CrateDB PHP PDO adapter

A Ruby client library for CrateDB.

huge list of database benchmark

Ruby on Rails ActiveRecord adapter for CrateDB

The admin user interface for CrateDB.

The CrateDB Kubernetes Operator provides a convenient way to run CrateDB clusters inside Kubernetes.

A JDBC driver for CrateDB.

Cloud-hosted Database Performance Data

CrateDB driver for Rust

A visual stat tool for CrateDB clusters

Alternative admin panel for CrateDB databases

A collection of clear and concise examples how to work with CrateDB.