Fluid is a WebKit-based site-specific browser (SSB) for Mac OS X created by Todd Ditchendorf. It has often been compared to Mozilla Prism and mentioned in Lifehacker, TechCrunch, 43 Folders, the 37 Signals blog, and on InfoWorld as a way to make web applications more like native desktop applications. It comes natively with support for userscripts and userstyles (like Stylish for Mozilla Firefox) for the modification of the look and feel of web applications.