There was a download of GroundSchool 7.55.0004 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions of the tool are 7.5, 7.3 and 6.0.
This PC program is suitable for 32-bit versions of Windows XP/Vista/7/8/10/11. We recommend checking the downloaded files with any free antivirus. This software was originally designed by Dauntless Software. The GroundSchool installer is commonly called GroundSchool.exe or GroundSchoolV5.exe etc. GroundSchool belongs to Education Tools.
From the developer:
GroundSchool is designed to help you learn the material and score highly on your test in the most efficient manner possible. This software represents years of listening to and understanding the needs of pilots and mechanics. The program is designed with the singular goal of helping you learn the material so you can pass your FAA written test with a minimum of time and effort.
You may want to check out more software, such as GroundSchool JAA ATPL, GroundSchool JAA CPL or GroundSchool JAA ATPL - Instrumentation, which might be similar to GroundSchool.