Relational Database
Postgres-native columnar storage extension
A tiny KV storage based on skiplist written in C++ language
A powerful, cross platform, SQL database system
Chess Database and PGN viewer
Toolkit for working with and mapping geospatial data
Database Replication, Filtered Synchronization, and Transformation
A RocksDB compliant high performance scalable embedded key-value store
a set of foundation classes for database engines
A Database System for Metamodeling and Method Engineering
Conductor is a microservices orchestration engine
ZeroMQ core engine in C++, implements ZMTP/3.1
A graph database as a Redis module
ETL engine based on Groovy
A nuts and bolts web engine / CMS (Content Management System)
A crazy fast analytical database, built on bitmaps
GraphQLmap is a scripting engine to interact with endpoints
Applications for data management
dBase for Java
Embeddable JSON Database engine C library
A very simple pure key => value storage system that speaks Redis
MySQL Proxy using Java NIO based on Sharding SQL, Calcite
A MATLAB(R) Mex-DLL to SQLite Databases
Tabix.io UI
Search engine and data mining applications and ClueWeb datasets.