I've used dyers polypore for tinder before, works well, and it can be used for dying too! I've used the horses hoof for amadou and I've seen it used as a hearth board before, I used some chaga as a hearth board just today, worked well! I've heard of cramp balls used as an insect repellent, smell quite nice too! I've used an artists conk for drawing on. A maze gill polypore, especially when charred, works as a good tinder too. Chaga so quite famous for its medicinal value, the tea is pleasant but you can make an tincture with it- could be with a try? Something with a trama layer can be used as a wick, the fungus itself can be hollowed out and filled with beeswax and used as a candle, not tried that one yet though. I've used fungi, any dried polypore will work really, to let smouldering on a fire for a while and you get lovely embers from them
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