Redis is an open-source in-memory data structure store used as a database, cache, and message broker with sub-millisecond performance.
Airtable
databases
Database-spreadsheet hybrid for flexible team workflows.
Apache Kafka
Distributed event streaming platform for high-throughput data.
Appwrite
Appwrite is an open-source platform for building applications at any scale.
ArangoDB
Multi-model database for documents, graphs, and key/value.