Is there a mod that will tell you which gem you've captured a soul in? Like a message pops up telling you which gem you've captured the soul in. It's kind of annoying to keep constantly checking whether or not my grand soul gem was used or if my lesser soul gems were used instead.

Although this isn't what you asked for, what you actually want is http://www.tesnexus.com/downloads/file.php?id=35393.

Incidentally, pretty much all of TNO's mods are outstanding.

Excellent. That looks perfect. It's not gonna bog down my computer is it?

Nope. Shouldn't even notice it is there. (aside from things working better.....)