What it is
For those who are unfamiliar with Destiny Item Viewer the app allows you view and move around your inventory easily and quickly allowing you to setup loadouts with multiple weapons or one weapon, multiple armor or one armor piece, various filters, see what weapons you are missing, share your inventory with friends, and more.
It is perfectly safe and open source code that doesn't require you to log in directly with it because it is using the already logged in credentials from Bungie.net.. You are free to review the code that communicates with Bungie here: https://github.com/dasilva333/DIM/blob/mixed/scripts/bungie.js to ensure it's safe to use however I assure you from the many people who contribute to this project and help me find bugs that it is perfectly alright.
Transfer Pop up: http://i.imgur.com/hjLrO9i.png
DestinyDB tooltip with custom perks & stats: http://i.imgur.com/UH8AvGq.png
Weapons View: http://i.imgur.com/gMpnHIh.png
Armor View: http://i.imgur.com/fkSG3u5.png
Other View: http://i.imgur.com/c9FPrJ2.png
Transfer Materials & split stacks: http://i.imgur.com/hqvhk8m.png
Create loadouts with more than 1 weapon type: http://i.imgur.com/oVe4MbU.png
Find Missing Items from a Set: http://i.imgur.com/jl3j1ZM.png
Share your inventory with friends with a share URL powered by DestinyExotics.com: http://i.imgur.com/ft9G5ZH.png
Smart transfer system accommodates for full vaults by swapping items instead of transferring: http://i.imgur.com/jQICzmc.png (in the screenshot the primary weapon is transferred and the special weapons are swapped)
Search by perk: http://i.imgur.com/qGNNduy.png
Search by name: http://i.imgur.com/HnDse6v.png
Visit the More Info link for information on how to install and use it for each platform.
Firefox version found here: (currently up to a few dozens users active on Reddit)
More info here: http://www.reddit.com/r/DestinyTheGame/comments/316hx4/discussion_destiny_item_viewer_for/
Report Bugs or Issues and more information