National Poetry Writing Month
Main Page – updates daily with prompts and special features
Prompts from 2015
Prompts from 2014

Writers’ Digest Poem-a-Day Challenge
Daily Prompts
Poem-A-Day – read the featured poem of the day and try copying its style

Is Rhyming Poetry Out?
An interesting discussion of rhyme in contemporary English poetry, plus a model to try imitating: [x]

ABRA: A Living Text – a mobile app that displays randomized word-salad poems and lets you move the words around, swap them out, or change the color of their font; a source of avant-garde inspiration.