Here are some useful tools to compliment your Elite Dangerous game play.

Websites

Elite:Dangerous Astrometrics

EDRefCard

EDSM (Elite Dangerous Star Map)

High Grade Emissions Finder

Inara

Spansh

Applications

EDCoPilot

EDDiscovery

Elite Dangerous Market Connector (EDMC)

Elite Observatory

Elite Observatory Plugins

Elite Dangerous Odyssey Materials Helper (EDOMH)