Wikipedia's List of pitch intervals is great, but I can't find a single comprehensive list of just intonation triads/chord names anywhere, so I'll start making my own.
These are copied from Wikipedia or wherever. No guarantees of accuracy.
Several triads are illustrated in my consonance map.
Triads
2:3:4 power chord / fifth chord
3:5:7 "major triad of the Bohlen–Pierce scale"