Digibuzzer

Bracket is a web-based tournament system for organizing and managing competitions.

A web app for hosting quizzes with player answer submission, master controls, and configurable question types.

HumHub is an open-source social networking and collaboration platform for intranets, knowledge bases, and community spaces.

Loomio is open-source software for helping groups make decisions together.

Hitobito is an open source web application for managing organisations and communities with complex group hierarchies, members, events, courses, mailings, and communication.

OpenSlides is a free, web-based presentation and assembly system for managing and projecting agenda items, motions, and elections.

Online service for planning an appointment or make a decision quickly and easily: Make a poll, Define dates or subjects to choose, Send the poll link to your friends or colleagues, Discuss and make a decision.

Create collaborative surveys, quizzes, brainstorms, and word clouds (documentation in French).

An automation tower defense RTS written in Java.

Puter is an open-source internet operating system for managing files, apps, and games, and for building and publishing web apps and games.

Luanti is a free open-source voxel game engine for easy modding and game creation.

Habitica is an open-source habit-building program that turns life management into a role-playing game.