Deskcap3 3.0.7 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. The program lies within System Tools, more precisely Virtualization. The actual developer of this free software for Mac is Tom Bluewater. We recommend checking the downloaded files with any free antivirus.
From the developer:
Deskcap 3 is a desktop application that lets you create a virtual work area on your desktop. You can use this tool to create a virtual frame so that it will cover the outside of the visible area with a color frame. You can create any number of virtual frames. The application comes with a status menu. In order to set a virtual frame, you can just select one under the status menu.
You may want to check out more Mac applications, such as WidgetOrganizer, CernVM Installer or 8Bitdo XPad, which might be related to Deskcap3.