These are public sites running GNU MediaGoblin:
- https://gobblin.se (previously mg.wandborg.se) -- Registration open, all media types enabled (except STL/3D, at the moment) -- details; Joar/mg.wandborg.se.
Your browser may not trust the certificate authority: http://wiki.cacert.org/InclusionStatus.
- http://roaming-initiative.com/mediagoblin/ running on http://hyperboria.net/ apparently! reddit thread
- http://mediagoblin.com -- Currently registration and video are disabled; you have to ping Chris Webber for an invite.
- http://isengaara.de -- IsengaaraP's mediahub for sharing eCantorix songs and コスプレ photos.
- https://efjz.in -- "EricFontaineJazZmediagoblIN" is for me to archive recordings of music performances of me and my fellow musicians.
- http://barn.kerosenecow.net/ -- Registration disabled. This is mainly a showcase for development of the MG-GIMP project (a Mediagoblin plug-in that permits hosting of GIMP images and resources).
These are instances run by organizations, usually having registration limited to organization members:
- http://filme.ceata.org -- Fundația Ceata, Romanian Free Software and Free Culture activist organization. Registration is currently disabled.
- http://media.libreplanet.org -- Videos of the LibrePlanet 2013 conference (Free Software Foundation). Registration is currently disabled.
- http://media.openvideo.pro -- Open Video Productions, L.L.C. Registration is currently disabled.
Also, these sites are running MediaGoblin, but are for more limited audiences (family/friends of person who's running it, etc):
- maiki’s baby photo site
- haise family photos (currently with a baby focus)
- jpope's instance -- Registration currently disabled.
- thelovebug's instance (registration closed)
- spaetz' private pics Sebastian Spaeth's pictures, family and stuff (registration closed)
- gallery.Dick-Thomas.co.uk Dick Thomas' pictures, family and stuff (registration closed)
- media.wigunnara.com Giri Alam's pictures, family and stuff (registration closed)
- photos.katsarov.org Photos by Anton Katsarov (registration closed)
- media.micha.elmueller.net Photos by Michael Müller, all licensed under CC-BY (registration closed)
- photos.technicallyandrew.com Photos by Andrew Browning (registration closed)
- noreal.info/galeria Run in a Raspberry-pi by Arder Vegan (registration closed)
- ardervegan.info/media Run in a Raspberry-pi by Arder Vegan (registration closed)
- mediagoblin.aurka.com janssen’s personal mediagoblin-instance with concerts, demonstrations and other stuff (registration closed)
-  Pictures and music from Charles Pehlivanian, hosted on a Raspberry Pi.
- Indyshop:Fashion Blog & Independent Shop Showcase - Registration by email request for independent brick and mortar shops only.
You can add your instance here, too!