But that for me doesn't capture the aspect of it being freely available to examine/read - perhaps such a term doesn't exist!

Minified JavaScript is only marginally easier to read than disassembled/decompiled binaries.

I don't think there's one term. "An application with exposed/visible source code", maybe.

The term "shared source" exists, and sort-of covers this scenario:

http://en.wikipedia.org/wiki/Microsoft_Reciprocal_License#Mi...