This is the long awaited expansion to EngBags, which works with 2.0. Yay!
In addition to the auto-sorting you've come to know and love, I've added many new features, including searching for items (in mail, etc.) You can also see and use the original default UI bags, which have slots free overlaid on top of them. There are also many convenience features, like highlighting new items, colored spotlighting, and purchase bank bags without having to unload the addon. A visual edit mode allows you to rearrange categories to your taste, and an advanced customization window enables you to completely configure every aspect of TBag.
TBag can only "see" something you've seen, so for every character:
1) Open your bags
2) Go to the bank
3) Check your mail
4) View your body
5) Open all your trade windows
This allows you to view the bag and bank contents of your characters at any time (sorted according to their trade skills) by clicking the name dropdown in the upper right. It also enables you to do a full item search from the search textbox just to the left of the name dropdown.