TiDB - A distributed NewSQL database compatible with MySQL protocol.
Percona XtraBackup - A free, open source, complete online backup solution for all versions of Percona Server, MySQL® and MariaDB®.
mysql_utils - Pinterest MySQL Management Tools.

MariaDB - An enhanced, drop-in replacement for MySQL.

PostgreSQL - The world's most advanced open source database.

Amazon RDS - Makes it easy to set up, operate, and scale a relational database in the cloud.

Crate.IO - Scalable SQL database with the NOSQL goodies.

Key-Value

Redis - An open source, BSD licensed, advanced key-value cache and store.

Riak - A distributed database designed to deliver maximum data availability by distributing data across multiple servers.

AWS DynamoDB - A fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale.

HyperDex - A scalable, searchable key-value store. Deprecated.

SSDB - A high performance NoSQL database supporting many data structures, an alternative to Redis.

Kyoto Tycoon - A lightweight network server on top of the Kyoto Cabinet key-value database, built for high-performance and concurrency.

IonDB - A key-value store for microcontroller and IoT applications.

Column

Cassandra - The right choice when you need scalability and high availability without compromising performance.

Cassandra Calculator - This simple form allows you to try out different values for your Apache Cassandra cluster and see what the impact is for your application.
CCM - A script to easily create and destroy an Apache Cassandra cluster on localhost.
ScyllaDB - NoSQL data store using the seastar framework, compatible with Apache Cassandra.

HBase - The Hadoop database, a distributed, scalable, big data store.

AWS Redshift - A fast, fully managed, petabyte-scale data warehouse that makes it simple and cost-effective to analyze all your data using your existing business intelligence tools.

FiloDB - Distributed. Columnar. Versioned. Streaming. SQL.

Vertica - Distributed, MPP columnar database with extensive analytics SQL.

ClickHouse - Distributed columnar DBMS for OLAP. SQL.

Document

MongoDB - An open-source, document database designed for ease of development and scaling.

Percona Server for MongoDB - Percona Server for MongoDB® is a free, enhanced, fully compatible, open source, drop-in replacement for the MongoDB® Community Edition that includes enterprise-grade features and functionality.
MemDB - Distributed Transactional In-Memory Database (based on MongoDB).

Elasticsearch - Search & Analyze Data in Real Time.

Couchbase - The highest performing NoSQL distributed database.

RethinkDB - The open-source database for the realtime web.

Awesome Data Engineering

A curated list of awesome things related to Data Engineering.

Databases
Data Comparison
Data Ingestion
File System
Serialization format
Stream Processing
Batch Processing
Charts and Dashboards
Workflow
Data Lake Management
ELK Elastic Logstash Kibana
Docker
Datasets
Realtime
Data Dumps
Monitoring
Prometheus
Profiling
Data Profiler
Testing
Community
Forums
Conferences
Podcasts
Books

Databases

Relational
RQLite - Replicated SQLite using the Raft consensus protocol.
MySQL - The world's most popular open source database.
- TiDB - A distributed NewSQL database compatible with MySQL protocol.
- Percona XtraBackup - A free, open source, complete online backup solution for all versions of Percona Server, MySQL® and MariaDB®.
- mysql_utils - Pinterest MySQL Management Tools.
MariaDB - An enhanced, drop-in replacement for MySQL.
PostgreSQL - The world's most advanced open source database.
Amazon RDS - Makes it easy to set up, operate, and scale a relational database in the cloud.
Crate.IO - Scalable SQL database with the NOSQL goodies.
Key-Value
Redis - An open source, BSD licensed, advanced key-value cache and store.
Riak - A distributed database designed to deliver maximum data availability by distributing data across multiple servers.
AWS DynamoDB - A fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale.
HyperDex - A scalable, searchable key-value store. Deprecated.
SSDB - A high performance NoSQL database supporting many data structures, an alternative to Redis.
Kyoto Tycoon - A lightweight network server on top of the Kyoto Cabinet key-value database, built for high-performance and concurrency.
IonDB - A key-value store for microcontroller and IoT applications.
Column
Cassandra - The right choice when you need scalability and high availability without compromising performance.
- Cassandra Calculator - This simple form allows you to try out different values for your Apache Cassandra cluster and see what the impact is for your application.
- CCM - A script to easily create and destroy an Apache Cassandra cluster on localhost.
- ScyllaDB - NoSQL data store using the seastar framework, compatible with Apache Cassandra.
HBase - The Hadoop database, a distributed, scalable, big data store.
AWS Redshift - A fast, fully managed, petabyte-scale data warehouse that makes it simple and cost-effective to analyze all your data using your existing business intelligence tools.
FiloDB - Distributed. Columnar. Versioned. Streaming. SQL.
Vertica - Distributed, MPP columnar database with extensive analytics SQL.
ClickHouse - Distributed columnar DBMS for OLAP. SQL.
Document
MongoDB - An open-source, document database designed for ease of development and scaling.
- Percona Server for MongoDB - Percona Server for MongoDB® is a free, enhanced, fully compatible, open source, drop-in replacement for the MongoDB® Community Edition that includes enterprise-grade features and functionality.
- MemDB - Distributed Transactional In-Memory Database (based on MongoDB).
Elasticsearch - Search & Analyze Data in Real Time.
Couchbase - The highest performing NoSQL distributed database.
RethinkDB - The open-source database for the realtime web.