AtcBox
Where traffic meets...
http://www.atcbox.com/index.php
Dutch VACC
Dutchvacc.nl simulated air traffic control organisation for the netherlands on the vatsim (www.vatsim.net) network. use flightplans with flight simulator on vatsim at dutch vacc.
http://www.dutchvacc.nl/
Squawkbox
Squawkbox
http://avsim.com/mike/sb_pc/sbhome.htm
WhazzUp
Full size cockpit building, glass cockpit: full screen boeing-type glass cockpit, boeing-smiths cdu, enhanced autopilot, whazzup, quickmap and other things...
http://www.projectmagenta.com/whazzup.html