The 1.7.4 version of Brewlet 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. We recommend checking the downloaded files with any free antivirus. The software lies within Developer Tools, more precisely Webmaster Tools. This free Mac app is a product of Zaid Kokaja.
From the developer:
Brewlet is a menulet that makes it easy to use brew.sh. For example, you need to manually check if some of your packages can be updated. With Brewlet it's easy: if everything is working swimmingly, then you'll see the normal shadow icon. If updates are available to be installed, the icon will become colored to get your attention – along with a notification if you wish. Once clicked, you'll be able to upgrade your packages, among other options.
You may want to check out more software for Mac, such as Boks, Navicat for Oracle or GoodPage, which might be related to Brewlet.