Shotwell-tumblr - Publishing plugin for Shotwell
Shotwell-tumblr is a publishing extension for the Shotwell photo manager. It allows to publish photos from your photo library directly to Tumblr. Exporting photos to Tumblr is just pushing the publish button, instead of manually uploading. Tags of photos are automatically added to the published photos on Tumblr.
Shotwell-tumblr is part of the Shotwell photo manager, a standard package of GNOME https://wiki.gnome.org/Apps/Shotwell