The King of GUID application is a free utility with ads for Android devices allowing individual highly unique GUID/UUIDs to be created.
The app fetches the Secure Android ID, Google Service Framework(GSF) ID, UUID, IMEI from the device. All the Ids are unique to each device. More features will be added in upcoming releases.
The UUIDGen for Android application generates a Universally Unique IDentifier (UUID), a 128-bit value guaranteed to be unique over both space and time. It provides a number of commonly used formats and makes it easy to share the generated results!