Userscripts.org

It overrides the flickr "Send to Group" button above your photo/video and lets you send your Flickr image or video to multiple groups simultaneously

Adds icons for Mail, Profile, Favourites, Scout, Interestingness, DNA, and the user's photo archive next to usernames in forums and on individual photo pages. It also allows you to send Flickr Mails without leaving the current page you are on.

A script to remove the invisible image blocking images on flickr

GMiF - Display Google Maps in flickr

By default, the Flickr home page shows seven images for you, fourteen from your contacts, and seven from a group. This script expands it to 10, 20, and 20, respectively. Requires Greasemonkey 0.8.

Lets you add tags to any flickr user, you can then view the tagged users via a whole range of different filters, including view by tag, view tagged users photos,favourites,testimonials,most interesting photos, photos of that user etc, etc

Lets you tag/categorise/sort your groups to help you find them again more easily and also lets you quit groups more easily

Show all images by this user in this group's pool

Changes colour of all flickr pages pages to white text on a black background. You can also now easily customise the colours in the script to whatever your preference is, using the new colour configurator.

Adds some options to help manage your Flickr mailbox. Including "Mark all as read" and delete all Notification emails, such as "you are x's newest contact" and Group Invitations, and also a "Nuke mailbox" function, that deletes all your mails

Adds tools for easier batch editing of titles and descriptions in the flickr organizer and also the "post upload" batch editing pages

Flickr Quoter adds a "quote" link to flickr discussions in groups, forums, and Flickr Mail, making it easier to quote people.

Script to add a textarea with BBCode

Gets rid of text ads in Flickr (the ones that show up after using AdBlock to get rid of the graphical ads)

removes the big grey stip at the bottom of every page at flickr

Add an actual date-time to flickr comments, instead of just the approx age.

Lets admins delete images from a group pool with 1 click, also lets you delete all a users images from the pool at once + also allows you to email + optionally ban or kick a user at the same time.

Adds local mini-database to color tag Flickr users you meet.

Adds a "mailto" button above Flickr photos, and also puts a "send page" link on every page, letting you send that page's link by Flickr Mail or Regular Email

Adds a Google group search. The default search is baaad.

Adds a select box with pre written comments, inviting the photo owner and viewers to join your groups.

Makes it easy to do an OLE cut-and-paste Flickr photos to your blog (ie: WordPress using TinyMCE, Blogger) and give the proper attribution

Shows the five most recent comments

Allows the searching for other photos that match more than one of a photo's tag.

Shows small picture version when you "mouseover" a flickr favorite.

Lets you publish your most popular photos listed (by views/comments/faves/interesting) + also your favourites list by other Flickr users on your PHP enabled website.

Post a story about the photo to your blog and add a description or comment on it automatically.

Highlights threads in which you've participated in Flickr groups.

Adds a ratings panel under current image in a Flickr photo page

Adds "add geotags" link to photo pages, which lets u add geographical data to your photos