A plugin for Xcode5, let the source code editor transparent and blur. open any projects by Xcode5, press (command -) or click menu Xcode->HLM(Closure), you will see the source code editor blurred.
press (command +), get the setting window for RSTransparentPlugin, in menu Xcode->HLM Setting, you can also search 'HLM' in menu Help->Search.