Godot is a popular Free and Open Source game development engine and toolset.

Seed your Postgres database with production-like data so you can code, debug, and test with ease

LinkFive Website

The open source Firebase alternative.

Part-Time adult. Building @tresorone & @geoman-io on the side. Previously @stripe

Dart is an open-source, scalable programming language, with robust libraries and runtimes, for building web, server, and mobile apps.

Spring Projects

JGraph specialises in browser-based diagramming components and applications.

Flutter is Google's UI toolkit for building beautiful, natively compiled applications for mobile, web, desktop, and embedded devices from a single codebase.

The senseBox is a Citizen Science DIY Toolbox for schools and citizens.