There is a new application available for Sparkers: Etcher.

What is Etcher?

Etcher is a powerful OS image flasher built with web technologies to ensure flashing an SDCard or USB drive is a pleasant and safe experience. It protects you from accidentally writing to your hard-drives, ensures every byte of data was written correctly and much more.

Installation:
apt update
apt install etcher-electron

Etcher

The Etcher developer is Jonas Hermsmeier and it is licensed under the Apache License 2.0.
The project page: github.com/resin-io/etcher