With over a million installs in over a dozen countries, it's Tumblr's most popular theme and for a good reason. Now in its second incarnation, Fluid Neue features totally rebuilt audio and photoset mechanics, upgraded framing and shadows, integrated Twitter, Instagram and Flickr feeds, and the slickest share widget ever made. And, as always, it's totally free.
Complete documentation and setup instructions can be found here.
Fluid is made by the wonderful folks at Pixel Union. We spend most of our time making beautiful Tumblr themes that cost around $49. Fluid is our way of saying thank you to the community that's supported us over the years.