The 2.1.1 version of GistTool 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 software relates to System Tools. 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. This free Mac app is an intellectual property of Viftio Apps.
From the developer:
GistTool is an OS X app that helps you manage your code snippets located at gist. It supports searching, creating, updating, and deleting gists, including gist-files. Using OAuth2 you can feel secure when logging in to your Github account. Another nice feature is a copy-to-clipboard button which allows you to copy the content fast.
You may want to check out more software for Mac, such as ImTOO DVD to MP4 Converter, inVIZible or CombineTextFiles, which might be related to GistTool.