b3dsdf (blender signed distance functions) is a collection of 2d signed distance functions and operators nodegroups for the shader editor in Blender 2.83+.
These nodes can be used by appending from the .blend file or use them with the addon which adds a menu in the shader editor.
These nodegroups can also be used with the asset browser by adding the .blend as an asset library and marking them as assets.
Download the latest release zip file from the release page and install the add-on as normal. There's no need to unzip before installation.
You might have to restart Blender for changes to take effect after installation / uninstallation.
A list of available nodegroups (currently at 61) can be viewed in shader_nodes.json. Examples (with images) can be found in the wiki page (work in progress).
