Above is a city pop up for their new, really cool Messages journal which folds into a mailable envelope, that could also be used on cards and gift wrap. Here are a few more that are lovely:
A DIY Moleskine looking gift box!
Printable bookmarks by Rebecca Venn and Anna Fedchenko respectively.
A very origami looking Paper Caper from Moleskine as gift wrap.
Image: mam for Gave That | Printables by Moleskine