Very valid question, especially when suddenly (+/- 2011/2012 era) companies start willingly selling a cable, connector, a relay and a tone generator in a box for €600 - €1200, some even falsely calling it a "charger", while costs of materials is about €100-€150.
This is the one I bought in 2013 and which comes very close to having no EVSE at all:
It was called "um-evse" and is now sold as "spark", see their website: http://www.charge-amps.com/spark/
You can select 3 chargecurrents; 6A, 10A, 16A and with our European 230V mains it chargers as fast as a "normal" EVSE. Properly installed European Shuko outlets can handle 16A without problems (although it's their very maximum), I have charged my car at about 20 locations this way and only 4 times I needed to switch to 10A. Things get a little warm, yes.
The price of this thing also ridiculously high, I paid about €600, 3 years ago, but no-one else offered such a compact, neat, clean evse back then.
I have no affiliations of any kind with that company, if you might wonder