Pukka Team

Pukka Team offers regular live snapshots of your team throughout the day, allowing everyone to know one's availability and also giving a feeling of togetherness (don't worry, it does have privacy options too). It integrates with hangouts, skype, slack, etc. to provide video calling features as well.

It is a bit of a quirky tool. Is everyone in your team comfortable with keeping their camera on all the time? Maybe then it might be an interesting way to keep everyone engaged - if not, maybe once a week!