Very good question, to which I think the answer is, unfortunately, no. I have various bits of generic obd software that read and clear fault codes, but nothing like as comprehensive as the Renault dealers' software.
As well as the VAG you mention, Alfa have AlfaDiag which does a good job. Looks like an opportunity for RenDiag.
Pirated versions of the 'official' Renault software can be found on offer on the web but at quite high prices and I have no idea whether they actually work, or what hardware they might require.
Currently in Jlucy's garage:
Renault Kangoo and Clio