I just found this great site full of constraints.
They put out a prompt challenge and see what words come back.
While digging for prompt, I came across these guys, and that is about the only description of them I can provide for you- that are in love with twenty consonant poetry. Don't know what that is? It's a writing constraint where you use every consonant once while using vowels freely (considering Y to be a vowel). I thought you might enjoy their website, which is weird and whimsical, and full of odd poetry, drawings, essays, a link to their small press, and audio recordings of their twenty consonant poems. Check it.