HR Consultant helping small and medium business create their recruiting and HR strategy. Virtual work and international culture expert. Having worked with fortune 10 companies, non-profits and start-ups all around the world, I have gained a wealth of experience on working with multi-cultural teams in different time zones and can use this to help you.
I do not know if your team is virtual or office based but I highly recommend http://www.teamphoria.com/
Thier offering means that you can send out surveys or use peer to peer kudos. It is also a great help during performance reviews
Their customer service is great and the grow with you.
Let me know if you need further information or would like to talk further about employee engagement.