Here are some web links I have collected and frequently use. Additional notice : for flight preparation use the official resources.
Web Link AIS, The Netherlands
Official website for AIS resources from The Netherlands
Web Link AIS, European
Official website with various AIS resources
Web Link AIB - Homebriefing
Official website of Air Traffic Control the Netherlands
Web Link DFS
Official website of Deutsche Flug Sicherung
Web Link Euro Control
Official website of Euro Control
Web Link Flight Prep
Handy site for flight planning
