The Fitbit (affiliate link) is one of the best tools for activity tracking.The interface is nice and the hardware is durable and syncs wirelessly. For a personal level is good, but using group-wise or equipping all employees with a Fitbit turns out to be non-existent.
During the past few days I’ve spend some time building a dashboard that lets people see the data from all users within a group. It gets all data trough the Fitbit API and summarizes it into a view per day/week/month.