I revived the FlickrExifTagger script and updated my own Flickr stream with it to add machine tags specifying the lenses I have been using to all photos I took during the last years. For this purpose I improved the code to better support custom rules and moved the project to Github.
During this process I also updated the software section in this blog and used some Wordpress plugin magic to auto-generate an always up-to-date overview page, which I always forgot to update.