Download of xctool 0.3.6 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The application is included in Developer Tools. This free Mac application is a product of Facebook Inc. We recommend checking the downloaded files with any free antivirus.
From the developer:
xctool is an extension for Apple's xcodebuild that makes it easier to test iOS and Mac products. It's especially helpful for continuous integration. The program is also very useful for continuous integration. You will be able to run the same tests as Xcode.app and the build/test results will have a structured output.
You may want to check out more Mac applications, such as Browsealoud, RAGE WebDesign or solr, which might be similar to xctool.