What types of NoSQL databases have you used in your practice?

In practice, I have used several types of NoSQL databases:

• Document-oriented (e.g., MongoDB) — store data in JSON-like documents, suitable for flexible schemas and rapid prototyping.
• Key-value (e.g., Redis, Riak) — provide fast access to data by key, often used for caching and sessions.
• Column-oriented (e.g., Cassandra, HBase) — optimized for handling large volumes of data and analytics.
• Graph databases (e.g., Neo4j) — designed for storing and processing graphs, useful for social networks and recommendations.

The choice depends on the task: Redis for caching, Cassandra for analytics, MongoDB for flexible data, etc.