For others who may have this requirement, I am now successfully using Afloat in OSX 10.8.5. After a lengthy search and trials and errors, I suceeded with:
Afloat 2.4 from https//www.macupdate.com/app/mac/22237/afloat
and
EasySIMBL from https//github.com/norio-nomura/EasySIMBL
Both are needed.
After downloading Afloat and expanding the .zip,
launch Afloat.xcodeproj and do a build to run,
and the same with AfloatScripting.xcodeproj.
(I'm not sure whether you need to build both of them, but it didn't hurt.)
Put Afloat.bundle into your user Library/Applications Support/SIMBL/Plugins folder.
Put EasySIMBL into your Applications folder.
Works like a charm, although it doesn't eliminate the need to click in to interact with the floating window and to click back in to any window it's floating above - but that would be asking a lot.
Thanks Frank Caggiano. BTW, what does the Sanscrit say? Or is it some S.E. Asian script?