A paradelle is a poetic form devised by Billy Collins, in which words are introduced in the first lines/stanzas, then reused & rearranged in later lines/the final stanza.
This editor app helps you keep track of which words you have already used, aiding in the writing process.
Try it out: https://dustinmichels.github.io/paradellEditor/
Uses lz-string to compress poems into URI component that can be shared in URL.