Links suggested:

German Econ. Research Institutes
IW Köln, CESifo, DIW, HWWA, IWH, IFW, IZA, StaBA, SVR, ZEW
Discussion Papers etc.
A list of journals and sites with discussion papers
Newspapers/Magazines/Online News
A hub for newspapers and magazines
Private :-)
Bad Wildungen, Berlin, Halle, Cologne, Warszawa