Frogr!

jUploadr is a cross platform, cross-site Photo uploader. Currently it runs on Windows Linux and OS X and supports both Flickr and Zooomr. It allows you to set all properties of a photo before you upload it. It also supports batch editing, so you can make short work of uploading a bunch of files.

Postr is a Flickr uploading tool for the GNOME desktop, which aims to be simple to use but exposing enough of Flickr to be useful. It isn't finished yet, but its a very capable uploader already.

best flickr client,justified views, chromecast,high resolution downloads, optimised for tablets

flickery lets you manage your Flickr photostream, photosets, groups, galleries, favorites and contacts with the ease of use of OS X.

Kflickr is an easy to use photo uploader for flickr written for KDE.

Photonic is a Flickr client for Mac OS X that let's you upload your photos to Flickr right from you Mac, without having to log into Flickr and upload photos by hand.

Upload and download your Flickr photos. photoSync is a desktop application that synchronizes your computer and Flickr account automatically.

Pure is a Flickr Client application* developed with content in mind. You can check your own feed, your favorite photos and the latest and most interesting photos uploaded.