Top 20 Open-Source Databases you should know

Top 20 Open-Source Databases you should know! Whether you're developing for web, mobile, or enterprise, this list covers the essential databases for all your needs. Here are  of the top open-source databases you should know about:

1. MySQL: MySQL is an open-source relational database management system. Reliable, high-performance relational database widely used in web applications. Its name is a combination of "My", the name of co-founder Michael Widenius's daughter My, and "SQL", the initialism for Structured Query Language.
2. PostgreSQL: Advanced, robust relational database known for extensibility and standards compliance with strong support for complex queries and data integrity.
3. MariaDB: A fork of MySQL, offering additional features and improved performance.
4. SQLite: A Lightweight, serverless SQL database engine for embedded systems and mobile apps.
5. MongoDB: A NoSQL database known for its flexibility and scalability, using a document-oriented model.
6. Cassandra: A highly scalable NoSQL database designed for handling large amounts of data availability and performance across many servers.
7. Redis: An in-memory key-value store, often used for caching and real-time analytics.
8. Elasticsearch: A search engine based on the Lucene library, used for full-text search and analytics.
9. Neo4j: A graph database that excels at handling connected data and complex relationships.
10. CouchDB: A NoSQL database that uses JSON to store data and JavaScript for queries.
11. InfluxDB: A time-series database optimized for first and high-write and query loads  availability.
12. Firebird: A relational database offering many ANSI SQL standard features.
13. HBase: A distributed, scalable, distributed big data store modeled for real-time read/write access after Google’s Bigtable.
14. OrientDB: A multi-model database supporting graph, document, object, and key-value models.
15. TimescaleDB: Time-series database built on PostgreSQL designed for time-series data, it is  optimized for fast ingest and complex queries.
16. ArangoDB: A multi-model database supporting graph, document, and key-value data models.
17. CockroachDB - Distributed SQL database with strong consistency and horizontal scalability.
18. Couchbase - High-performance NoSQL database combining document and key-value stores.
19. ScyllaDB - High-performance NoSQL database compatible with Cassandra.
20. PrestoDB - Distributed SQL query engine for fast analytics across various data sources.

These databases cover a wide range of use cases, from web applications to big data analytics. Do you have a specific project in mind where you need a database?