I made a class builder for the Mass Effect 3 Multiplayer! Have you seen it? (Thread on BSN)
http://narida.pytalhost.com/me3/classes/

Mass Effect 3 Multiplayer Unlock Checklist

Current version: 1.13alt (10th October 2012)

The Mass Effect 3 Multiplayer unlock checklist can help you keep track of which weapons, weapon mods and characters you have unlocked as well as showing an overview of all available items and their corresponding rarities. There are several versions available:

PDF Version
If you want to print it out.

Google Docs Version
Make a copy and fill it out in your browser.

Excel/OpenOffice
Please go to the Google Docs version and select File → Download as... to download the checklist in your preferred format.

For suggestions and/or corrections, send a message to Narida L on BSN (Bioware Social Network) or to Narida_L on Origin.

Thread on BSN

http://social.bioware.com/forums/forum/1/topic/343/index/9739702

Changelog

Version 1.13 (10th October 2012): Added Retaliation Pack DLC gear, weapons, weapon mods and characters.

Version 1.12 (21th Juli 2012): Added Earth Pack DLC gear, weapons, weapon mods and characters.

Version 1.10 (29th May 2012): Added Rebellion Pack DLC gear.

Version 1.9 (25th May 2012): Added Rebellion Pack DLC weapons and characters.

Version 1.8 (13th April 2012): Added Resurgence Pack DLC weapons and characters. Reduced capacity mamimum to 5, which is the current value. Sorry for the delay, I was on vacation.

Version 1.7 (26th March 2012): Added capacity maximum.

Version 1.6 (20th March 2012): Added N7 Arsenal Weapons, Battlefield 3 Soldier.

Version 1.5 (16th March 2012): Fixed AR Stability Damper (silver → blue), added equipment capacity upgrades.