You can keep track of all people and documents in given organizations (ensembles, in my case), and even use barcodes with specific numbers generated by Charms. These can be scanned to take attendance, check documents in or out, and more. Charms can also keep contact information, help maintain a library of documents in an organized/numerical manner, and provide a calendar for important work-related events. Review collected by and hosted on G2.com.
I dislike that sometimes the system bugs, causing numbers to be double assigned to documents or people. However, it notifies you when this happens. Sometimes the barcodes are not super sensitive, but usually they work just fine. Review collected by and hosted on G2.com.