I wrote a plugin for including Flickr images, videos, and sets into an Octopress blog. Screenshots:

octopress-flickr fancybox previews by Neil

Simple image by Neil

Sets in “slideshow” mode by Neil

sets by Neil

octopress-flickr-darkstripes by Neil

octopress-flickr-mobile by Neil
There are a number of hacks out there for doing similar things, but I particularly wanted a way to tell stories with Flickr sets. That meant captions, videos, next and previous links, and so on.
It’s reasonably easy to install, although you still have to hack a number of things to get it working. Octopress doesn’t have a very clean plugin system for modifying a bunch of things at once, but in fairness, if it did, it would probably turn into Enterprise Blogging Software.
Now that octopress-flickr is released, I already want more options, especially for set layout. But I think I’ll move on to other things for now - although I will happily accept pull requests!