I am an active member of WESS, the librarian group of "Western European Subject Specialists." The "Europe in Bits and Bytes" column in the most recent newsletter has a particularly rich summary of new online resources in various European countries and languages.
Some of them (like Europeana) I've mentioned here, but others may be new to you - for example:
- catalogues of digitized medieval manuscripts
- digitized proceedings of the French legislature since 1958
- Treccani Vocabulario and Enciclopedia online
For more information on these and other scholarly digital websites - from France, Italy, as well as Germany, Switzerland, Spain, Austria, and Benelux, see: