EasyCanvas 2.1.20 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The program lies within System Utilities, more precisely Device Assistants. This free program is an intellectual property of DEVGURU.
From the developer:
EasyCanvas allows you to use your iPad as a digital canvas or digitizer. You must install EasyCanvas program on Windows desktop as well as the app on your iPad so that you can write, draw, and paint on Windows programs using iPad touchscreen. Even though this tool is designed to work on most of the Windows programs, some features many not be accessible in Adobe CC 2014 and previous versions.
You may want to check out more software, such as ThinkPad-Konfiguration or Schmap, which might be similar to EasyCanvas.