HamBook (Full Web) is a super lightweight logger “program” that requires no installation. It's a single html file with almost 6000 lines of code that runs offline in your browser of choice. It has the ability to import/export ADIF and Cabrillo files.
I played around with it for a bit this morning to see if it could be used as a net logging program (I think it could, but with a few limitations).
I opened the file in a text editor and did a bit of “Find & Replace” to roughly translate some key terms from French to English. Here's my modified copy if anyone is interested in playing around with it a bit: hambook_en_v1.5.html.zip