If you're looking for some cool free ringtones, try browsing the web. Though free ringtones aren't as "cool" as they used to be, they still can draw a few glances from your coworkers https://tonosparacelular.net/ A Stranger Things theme song is a good example of a free ringtone. There are even ways to record your own songs and use them as ringtones.
One way to make your own ringtones is to download apps that allow you to record and edit audio files. These apps allow you to choose from hundreds of free ringtones and alarms and use WAV files as a fallback audio format. Some even offer apps and live wallpapers. Whether you want to play free music or make your own ringtones, there is a great app available for your smartphone.