Web applications like Gmail, Facebook, Campfire and Pandora are becoming more and more like desktop applications every day. Running each of these web apps in a separate tab in your browser can be a real pain.

Fluid lets you create a Real Mac App (or "Fluid App") out of any website or web application, effectively turning your favorite web apps into OS X desktop apps.

Creating a Fluid App out of your favorite website is simple. Enter the website's URL, provide a name, and optionally choose an icon. Click "Create", and within seconds your chosen website has a permanent home on your Mac as a real Mac application that appears in your Dock.

Fluid is free. You can download Fluid for free and create as many Fluid Apps as you like.

However, for $4.99, you can purchase a Fluid License which unlocks a few extra features:
1.Create Fluid Apps with Separate Cookie Storage. (Preferences ? Security ? Cookie Storage)
2.Pin Fluid Apps to the Mac OS X Status Bar. (Fluid App Menu ? Pin to Status Bar…)
3.Use Userscripts or Userstyles in your Fluid Apps. (Window ? Userscripts)
4.Use Lion Full Screen mode in your Fluid Apps. (View ? Enter Full Screen)

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A highly flexible tool that blurs the boundaries between working online and offline.