As a consequence of the relative slowness of the Italian vaccine distribution, I got bored of logging into the local health website that lists the (un)availability of vaccine shots for my age category, so I decided to build a tiny GNOME indicator that does that for me.
This is not strictly an extension, but a CURL+grep wrapper using the magnificent, although abandoned Argos extension for GNOME Shell. Essentially, as long as no doses are available for my health status that “ko” status is bound to stay, but once the doses for my age category arrive… well, then the extension will let me know it quite loudly.