ScreenKnock 10.2 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version among ScreenKnock for Mac users is 10.2. This free Mac app is an intellectual property of Chris World.
Screenknock.zip is the frequent file name to indicate the ScreenKnock installer. 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 unique ID for this program's bundle is ScreenKnock.
From the developer:
The fabled screen knock software is here. When you open the ScreenKnock application for the first time, you are in for a surprise. There’s just a small empty window there. No instruction, no options, no preferences, no nothing. Maybe Chris thought that the app needs nothing else but does what it is built to do: switch Spaces whenever you (lightly) knock the side of the Macbook.