Open Source Ruby Database Engines/Servers

ErosOnRails is a framework developed for cataloging works of art in cultural heritage institutions.

FGL is a tightly-integrated self-contained development & execution environment utilizing best-of-breed programming tools and methodologies, optimized web/application server, highly-scalable relational/object database, and robust extension interface.

OPEW is a powerful, complete, independent and extensible open source distribution stack for GNU/Linux based OS. Its goal is to provide a rich, portable, ready-to-run development environment focused on modern and robust programming languages in order to satisfy the common needs for a software development. OPEW includes the latest stable version of PHP, Ruby, Perl, Node.js, Go, Python and Lua, providing a powerful multi-language development enviroment. It's also given a full stack of open source DBMS (MySQL, PostgreSQL, MongoDB, SQLite3 and Redis). Git (SCM) is included as well with some tools for code versioning and review. OPEW is fully binary independent compiled stack and fully portable In the future OPEW aims to be extensible using addons then can be installed in the same stack improving itself. Currently OPEW is still an experimental beta version.

It's a web base application survey using Ruby on Rails and MySQL

Tokyo Cabinet is the successor of QDBM, a high performance database library similar to the DBM family. It also supports hash and B-tree databases and does not require any server process. The overall speed is improved compared to QDBM.