kFlickr is a standalone Flickr uploader for KDE. It allows for easy upload of photos with drag and drop from other applications (Konqueror). kFlickr also edits common attributes (title, description, privacy, tags) before sending the photo. Multiple users and batch editing of photos are supported.
This tutorial describes how to configure KFlickr and to start sending your photos. I assume that you’ve got your own Flickr account.