AWS offers a variety of managed database services that are designed to meet different application requirements. Here are some of the popular managed database services provided by AWS:

1. Amazon RDS (Relational Database Service): Amazon RDS offers managed database services for popular relational databases such as Amazon Aurora, MySQL, PostgreSQL, MariaDB, Oracle Database, and Microsoft SQL Server. It handles routine database tasks like backups, software patching, and automatic scaling, making it easier to set up, operate, and scale a relational database in the cloud.

2. Amazon DynamoDB: Amazon DynamoDB is a fully managed NoSQL database service that provides fast and flexible document and key-value storage. It offers automatic scaling, built-in security, and high availability. DynamoDB is a popular choice for applications that require low-latency data access and seamless scalability.

3. Amazon ElastiCache: Amazon ElastiCache is a managed in-memory caching service that supports popular open-source caching engines such as Redis and Memcached. It provides a high-performance, scalable caching layer to improve application performance and reduce database load.

4. Amazon Neptune: Amazon Neptune is a fully managed graph database service that is optimized for storing and querying highly connected datasets. It is well-suited for applications that require deep relationship analysis and recommendations, such as social networks, fraud detection, and knowledge graphs.

5. Amazon DocumentDB: Amazon DocumentDB is a fully managed document database service compatible with MongoDB workloads. It provides the scalability, performance, and availability of a fully managed service while preserving MongoDB’s querying capabilities and flexibility.

6. Amazon QLDB (Quantum Ledger Database): Amazon QLDB is a fully managed ledger database service that provides an immutable, transparent, and cryptographically verifiable transaction log. It is designed for applications that require a centralized, authoritative, and highly secure database with an immutable history of changes.

7. Amazon Timestream: Amazon Timestream is a purpose-built time series database service for handling large-scale, time-stamped data. It is optimized for ingesting, storing, and analyzing time series data from various sources, making it suitable for use cases such as IoT, log analysis, and industrial telemetry.

These are just a few examples of the managed database services offered by AWS. Each service is designed to cater to specific database needs, such as relational, NoSQL, caching, graph, ledger, and time series workloads. AWS manages the underlying infrastructure, backups, and maintenance tasks, allowing you to focus on developing applications and accessing databases with high availability and scalability.