Ship Builder to stat up ships before you buy http://coriolis.io/
EDDB - Elite: Dangerous Database https://eddb.io/
General useful website. Has commander's log to create your own log, public posting of community goals, and tools to search for the closest shipyard or outfitter that has everythign you want http://inara.cz/galaxy
Ship Buyers guide http://ebg.cmdrshub.com/
Exploration Guide http://needsmorepolish.blogspot.com/2015/04/fingerbobs-guide-to-exploration-in.html
Trading guide http://needsmorepolish.blogspot.com/2015/02/elite-dangerous-trading-step-by-step.html
Mining Guide https://www.reddit.com/r/EliteDangerous/comments/3o5fns/grays42s_complete_guide_to_14_mining_5_milhour_in/
Guide to surviving military zones (or any fight you are unfamiliar with https://www.reddit.com/r/EliteHudson/comments/40yfoi/some_military_strike_zone_tips/
Bounty Hunter's Guide https://forums.frontier.co.uk/showthread.php?t=132183
How to Filter the map to show Scoopable stars (stars that you can refuel at, if you have a fuel scoop) http://fuelrats.com/wp-content/uploads/2015/10/FilteringScoopables_instructions.jpg
How to interpret Scanner signals while in Rover https://www.reddit.com/r/EliteDangerous/comments/40s925/scanner_signals_explained_know_what_you_see/
Interactive Wave Scanner to see what the guide describes http://wavescanner.net/
Printing Reference to your bindings http://www.mcdee.net/elite/
See example result:
http://www.mcdee.net/elite/configs/nqmmkq-hotasx.jpg
http://www.mcdee.net/elite/binds/nqmmkq
(Alternate version, as I haven't tested either) http://troynt.github.io/elite_dangerous_controls_reference/
Configuration suggestions for Saitek controllers in Elite Dangerous http://www.saitek.com/elitedangerous/
Voice Attack for voice activated macros http://www.voiceattack.com/
Sound packs for voice attack (preconfigured macros and sound files for Elite Dangerous in Voice attack) http://hcsvoicepacks.com/
All about Joysticks guide How they work, what they do, and information about each of common sticks. http://mwomercs.com/forums/topic/100183-thomas-joystick-guide-recovered/
FaceTrackNoIR: A simple head tracking solution that only requires a webcam and no modding. http://facetracknoir.sourceforge.net/home/default.htm