Downloadr is a Windows application and a rather small one that allows you to make bulk downloads from your Flickr account to your computer. It authenticates with Flickr so that you can download private photos as well.
You can search photos by Fulltext, user, tags, place,set, date,interestingness, group and favorites. The largest available size is downloaded automatically and it writes EXIF and IPTC data so titles and tags are preserved within the photos.
This is a great little app that you can use to make backups or download photos for printing or whatever purpose you have for them. The software is free and you won’t have to worry about downloading newer versions because it’s updated automatically.