Insomniac 1.2 for Mac was available to download from 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. This free Mac application is an intellectual property of Sergio Martínez-Losa Del Rincón.
From the developer:
Insomniac is a small application that prevents your Mac from entering the sleep mode. The tool lives on your status bar where it takes a discrete place to let your productivity flow. With one click, you just switch on/off to prevent your Mac from sleep.
You may want to check out more Mac applications, such as TwistedLands3-Protect-FREE, Magic Mind or Twisted Lands Trilogy, which might be related to Insomniac.