There are lots of websites that can help improve your time online. This page is intended as a non-exhaustive list of links to free resources that might help you when flying online. You will also find plenty of resources available on local websites.

Charts

AirNav A resource for airport and navaid information.
Navigraph A payware resource for viewing charts worldwide and updating AIRAC data.
SkyVector An excellent resource for viewing worldwide charts and flight planning.
VATSIM Charts An excellent resource for finding worldwide charts.

Who's Online

VATSIM Statistics List of currently connected members
Volanta An excellent free personal flight tracker for VATSIM
VATSpy A Windows program displaying a map of pilots and controller locations
vRoute Windows program showing online members by country
Vattastic Browser map of pilots and controllers
QuteScoop An open-source multi-platform traffic viewer

Flight Planning

vRoute vRoute accepts flightplan submissions from members around the VATSIM world.
Simroutes A collection of flightplans, predominantly for USA routes.
VATroute A collection of flightplans, predominantly for European routes.
Little Navmap free open source flight planner, navigation tool, moving map, airport search and airport information system.

Training

VATSIM Pilot Learning Centre Tutorials and guides for the basics of flight.
Official VATSIM training organisations Links to all of the organizations authorized to perform VATSIM pilot training.

Free Model Matching

Alpha India Group A completely free model matching AI package for various flight simulators, which means you will see other VATSIM users as their correct aircraft type and livery when flying online.