TrueRond 2.62.1 was free to download from our software library. The common filename for the program's installer is TrueRond.exe. The actual developer of the free software is TrueGage™ Surface Metrology. The software is included in Photo & Graphics Tools. The most popular version of the program is 2.6.
From the developer:
TrueRond has the capability to be interfaced directly to multiple gage heads allowing components to be measured in a much more efficient manner. Multiple radial measurements can be made simultaneously to check the flatness of many parts such as disk brakes in one quick measurement.
You may want to check out more software, such as Plate 'n' Sheet Development Pro., CAD To DMC or TachyCAD, which might be related to TrueRond.