The 1.0.5 version of Triplety 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. This Mac app was originally designed by Flammy Design. 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. Triplety for Mac lies within Developer Tools, more precisely Webmaster Tools.
From the developer:
Triplety is a development environment for web designers and developers. It includes a local HTTP server with live reload for external browsers and auto-completion HTML, CSS and Javascript. With Triplety, you can save the hassle of writing boilerplate code. Your code works with live preview and live reload.
You may want to check out more software for Mac, such as RAGE Domainer, ModelBaker or iGooMap, which might be related to Triplety.