Gotta catch 'em all...wait, wrong game.
 

• Website: Destiny Exotics - Keep track of which exotics and special event items you've gotten.

• Website: Destiny Ghost Hunter - View what Dead Ghosts you've discovered, and where to find the ones you haven't. Also view calcified fragments per character.

• Website: Calcified Fragments - See which fragments you've unlocked.

• Website: Destiny Maps - Maps to find your way around the solar system.

• Website: Golden Chest Guide

• Website: Is The Gunsmith Selling Rare Fusion Rifles? - Useful for the Sleeper Simulant quest. (Also possibly Gunsmith quests)

• Website: Destiny SIVA Clusters - See which SIVA Clusters you've unlocked.