On Flickr, you never know where people that visit your photo have found it. Flickr: Add referrer into comments is a greasemonkey script that will add a small amount of text at the end of your comments saying where you come from. If everyone starts using this script, then it will be easy to see where the people have found your photos and how they got to comment on them.
Flickr Photo Compass is a greasemonkey script that provides a "compass" displaying the 8 closest photos to the actual one in the directions N, NE, E, SE, S, SW, W, and NW when you visit geotagged photos on flickr.com Itís a new way to browse photos of places on Flickr. By clicking on the direction icons, you can move around and find other photos.
Flickr Upcoming.org event details is a Greasemonkey script that show details of the upcoming.org event a Flickr photo is attached to. If the photo does not have an upcoming tag, a select box will show your upcoming.org*s past events so that you can associate the photo to an event. If the photo is tagged with an upcoming tag (of the form upcoming:event=XXXX), information about the events are displayed. If you have the right to tag the shot, you can transfer the information as a tag of your shot. If the venue has been geolocated by upcoming, you can geotag the photo directly without going through the map interface.
Flickr Follow Comment is a Greasemonkey script that improves Flickr's "Comments You've Made" page. It allows you to see 10 pages of comments and filter the comments displayed to show only photos from your contacts/friends/family with new comments, photos with new comments and less than 10 since yours (so you can still see your original comment), photos with new comments that you have not marked as ignored, and photos with new comments since your last visit to the "Comments Youíve Made" page.