You can download ETSViewer 1.0 from our software library for free. The actual developer of the free software is Enthuware Technologies. ETSViewer is included in Education Tools.
From the developer:
ETS Viewer is used to access mock exams contained in an ETS file.
You may want to check out more software, such as E-Slate, Colors or MindGenius Education, which might be related to ETSViewer.