The 1.0 version of DockTemp X 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. The actual developer of this free Mac application is HillmanMinx Software. 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 application lies within Theming Tools, more precisely Multiple Desktops.
From the developer:
DockTemp displays the outside temperature in your OS X Dock.
You may want to check out more software for Mac, such as Occurrence Selector, which might be similar to DockTemp X.