ios-backup.yml - creates folders for each device and saves a time stamped backup in that device's folder
cisco-ios-snmp.yml - adds snmp settings to devices based on the snmp_settings.yml file.
aci-epg-demo.yml - This connects to a Cisco ACI SDN controller and creates a tenant, an app profile, an VRF, a bridge domain, and 10 EPGs. I heavily use variable replacement, all of which are easily understood in the playbook itself. I have a blogpost explaining the usage of the script here http://gregsowell.com/?p=6410.