The OPAL development team never ceases to amaze, as they have the most peculiar habit of adding features to their coin which I personally plan to use at some point. Check out their latest addition for example, allowing Android users to use Opacity (encrypted messaging) in an iMessage style fashion.
Even though this feature had been announced a little while ago, the Opal development team had not given any ETA on when we could expect this feature to go live. You can imagine my surprise a few minutes ago, when I found out this feature was made available late last night, and no one told me about it.