The 1.6.2 version of SourceTools for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The actual developer of this free software for Mac is Dominik Hauser. The software lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
Source Tools is a collection of useful Xcode source editor extensions.
You may want to check out more software for Mac, such as RAGE Domainer, Multisite for iWeb or konqueror, which might be similar to SourceTools.