The A2MP MultiPack from Eberlestock looks like a very versatile pouch. It has a ton of pockets and can be carried several different ways.
The A2MP MultiPack features 10 different pockets! There are internal slip pockets, mesh see through pockets, a zip up main compartment, and a some smaller exterior pockets. You should have no problem organizing a ton of small items in the A2MP.
The carry methods are as varied as the pockets. It can be used as a chest pack in conjunction with your backpack. In this configuration it allows you to carry items that you want immediately accessible without having to remove your pack. It can also be attached to MOLLE webbing. It would make a heck of an organizer pouch for a pack that lacked a lot of internal organization. You can also mount the A2MP to just about any strap which opens up possibilities like a waist pouch or even attaching a shoulder strap.
You can find much more information and pictures on the Eberlestock website.