The Joint Research Centre (JRC) of the European Commission has released the first version of the INSPIRE validator.
It is based on new version 2 of the ETF software, which was developed to support the requriements of the INSPIRE validator, and includes more than 50 test suites for datasets, metadata records and download services.
More information can be found in the announcement by JRC.
Here is the direct link to the landing page: http://inspire-sandbox.jrc.ec.europa.eu/validator/