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LucidDB is a Database Management System (DBMS) optimized for business intelligence.

H2 – relational database management system written in Java

H2 is a relational database management system written in Java. It can be embedded in Java applications or run in client-server mode.

HSQLDB – Java database

Hyper Structured Query Language Database is an SQL relational database management system written in Java. It has a JDBC driver conforming to ANSI SQL:2008.

Apache Derby – relational database implemented entirely in Java

Apache Derby is a full-featured, open source relational database management system (RDBMS) that is based on Java and SQL.

OpenLink Virtuoso – middleware and database engine hybrid

OpenLink Virtuoso is a middleware and database engine hybrid that combines the functionality of a traditional RDBMS, ORDBMS, virtual database

CUBRID – relational database management engine, with built-in enterprise grade features

CUBRID is engineered as a completely free, open-source relational database management engine, with built-in enterprise grade features.

Drupal Webform – build any type of form

Drupal Webform allows you to build any type of form to collect any type of data, which can be submitted to any application or system.

Form Tools – powerful flexible PHP/MySQL script

Form Tools is a powerful, flexible, PHP/MySQL script you install on your website for managing your forms and data.

EUSurvey – online survey-management system

EUSurvey creates online surveys and forms. Create official surveys of public opinion and forms for internal communication / staff management.

Yakforms – easily create forms for your community

Yakforms allows you to host a full-fledged online form service. Edit and publish forms easily, collect and analyze submissions online.

Nextcloud Forms – self-hosted simple surveys and questionnaires

Nextcloud Forms lets you can create as many forms, with as many questions, and shared with as many people as you like – without limitations.

LimeSurvey – online survey tool

LimeSurvey is survey software. Advanced features like branching and multiple question types make it a valuable partner for survey-creation.

OhMyForm – create stunning mobile-ready forms, surveys and questionnaires

OhMyForm is a form builder similar to Google Forms or TypeForm. It’s written in Python.

SurveyJS – build fully-customizable surveys, forms and quizzes

SurveyJS is a modern way to add surveys and forms to your website. It has versions for Angular, jQuery, knockout, react and vue.

Zaz – multi-platform arcade action puzzle game

Zaz is a multi-platform arcade action puzzle game where the objective is to get rid of all incoming balls by rearranging their order.

Simon Tatham’s Portable Puzzle Collection – large collection of single-player puzzle games

Simon Tatham’s Portable Puzzle Collection is a collection of 39 single-player puzzle games.

Neverball – tilt the floor to roll a ball through an obstacle course before time runs out.

In the grand tradition of Marble Madness and Super Monkey Ball, Neverball has you guide a rolling ball through dangerous territory.

Numpty Physics – open source game in the spirit of Crayon Physics

Numpty Physics is a drawing puzzle game in the spirit of Crayon Physics. Numpty Physics uses the Box2D engine.

GNOME 2048 – single-player sliding tile puzzle