No specific info about version 10.8. Please visit the main page of ArcGIS Engine on Software Informer.
ArcGIS Explorer Desktop is a GIS viewer that gives you an easy way to explore.
ET GeoTools improves the editing capabilites of ArcGIS.
It is a plug-in that provides interoperability between AutoCAD and ArcGIS.
ArcGIS Image Serverenabling developers to integrate it with their applications
Baja Engine helps you create professional quality game or application
Map View SDK is available as a stand alone Developer kit.