Free Tools for BIRD.
Bird Software Solutions is the main contributer to the open source project Eclipse Free BIRD Tools providing free tools for the ECB's BIRD project, governed by the Eclipse Foundation.
Bird Software Solutions also provides a free web based editor for Ecore4Reg downloadable here which can be used with Microsoft's Github Code Spaces, and so does not require any software installed on your local machine. It can also interact with all the great VSCode plugins for version control and other features.
Currently this Ecore4Reg editor is text only and does not have the visualisations that exist in the Eclipse Desktop version.
A video showing how the web based VSCode editor can be used is avilable here