Downloading FlickrExport for iPhoto 4.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The program is included in Internet & Network Tools. This software for Mac OS X is a product of Fat Cat Software.
From the developer:
FlickrExport is a plugin for iPhoto that provides advanced photo uploading to your account on Flickr. Start by simply selecting the photos you want to upload and using iPhoto's "Export" command, and then use FlickExport's advanced options to customize the data included with your photos.
You may want to check out more Mac applications, such as SaD For iPhoto, MPV's iPhoto '11 101 - Core iPhoto '11 or ADD For iPhoto, which might be related to FlickrExport for iPhoto.