Open Source JavaScript Database Engines/Servers

OmniDB is an open source, collaborative web tool for database management focused on interactivity and ease of use, with a design that allows it to be both powerful and lightweight. OmniDB is a browser-based tool, which means it can be accessed on any platform with the browser as a medium. It features a responsive, single-page interface, a unified workspace, a smart and beautiful SQL editor and more. It currently supports Windows, Linux and OSX platforms, and the following DBMS: PostgreSQL, MariaDB, Oracle, MySQL, SQLite (WIP), Firebird (WIP), SQL Server (WIP), IBM DB2 (WIP).

FlightFeather's goal is "social networking for everyone". This means that anyone should have a chance to run a popular social networking site -- on minimal hardware, and without wasting bandwidth.

WODA is a semi-relational database for beginners to work on data and to learn database basis. With web-based GUI and CLI. Currently in rewrite using Bootstrap for web UI. Built with beginners in mind, it is far easier than any other tool I know, while remaining powerful for advanced users (Perl langage is directly available). Databases can be defined, maintained, added-to, modified, and queried entirely through the web interface without programming. It comes from the 90's and thus is very low in computer resources. Žiga Turk, Woda original author, is also the creator of the famous Virtual Shareware Library (that later evolved into shareware.com) and the former Minister for Education, Science, Culture and Sports in the Government of Slovenia.