Some FS-related links:

Real aviation related:

Schiphol Flightinfo (Actual and very detailed flight information)

Online flying (SATCO):

SATCO headquarters
SATCO Europe (European division of SATCO)
The Dutch ARTCC (Dutch ARTCC page as a division of SATCO Europe)

Other homepages from me are:

KLM Europe/TCA Codesharing (my own department)
ATC Procedures in the Netherlands (a page about ATC procedures in NL for use with SB)

TradeWind Caribbean Airlines:

TradeWind Caribbean Airlines (frontpage)

Scenery related pages:

Norway 98 Scenery
Swedflight v4.1

KLM 1023/4 adventure page:

Dutch Adventure Design Homepage (also NavDash related files available)

Other interesting FS-pages:

NavDash v2.5 by E-Chan (Great navigation FMC tool)
Dutch Flight Simulator Site (Dutch aircraft and scenery)
Project Freeware - Hangar Page (Freeware aircraft models)