We wrote a small demo app called sendme to show off iroh. It is cli only, works on all operating systems that we use internally, and we frequently use it to send around qlog files:

https://www.iroh.computer/sendme

There are several projects inspired by sendme that use the same protocol but add mobile device support and a GUI:

https://www.altsendme.com/en

https://github.com/ARK-Builders/Drop-Desktop

https://github.com/zignig/sendme-egui