CAM XML Editor for XML+JSON+Hibernate+SQL Open-XDX sponsored by Oracle
Concise spatial query and representation system (c-squares)
RAQUEL : "Relational Algebra Query, Update and Executive Language"
Simple and powerful toolkit for BoltDB
ErlMySQL is a MySQL client (driver) written in Erlang.
Columnar storage extension for Postgres
A NoSQL C#/.NET RethinkDB database driver with 100% ReQL API coverage
Cross-platform open source Redis DB management tool
High-performance time-series aggregation for PostgreSQL
An Internet-scale database
Create advanced Excel spreadsheets using .NET
DBLX3 Relational Database System
:wrench: Cross-platform GUI management tool for Redis
A redis protocol compatible nosql, it support multiple storage engines
FastVersion is a Qgis plugin for data versioning in a Postgis database
A text based book-keeping application
A rudimentary implementation of a basic document database in Go