The trimeric is a product of the digital age and can be traced back to Dr. Charles A. Stone (which seems to be a pseudonym). It’s a short poem with just thirteen lines in a 4/3/3/3 pattern. Most of the lines in the initial quatrain become refrains in the tercets, with only the first line of the poem being unrepeated.
The haiku sonnet is a poetic form by David Marshall that combines four haikus and a final couplet to generate a 14-line poem. Despite being called a ‘sonnet’ it does not utilize meter or rhyme scheme under Marshall’s model.
“The Golden Shovel” refers both to a 2010 poem by Terrance Hayes as well as to the form that the poem created. Golden Shovel poems include a line or lines from another work embedded in the end words of a new poem, usually resulting in an interesting conversation between old and new.
Double dactyls are a unique form with a seemingly arbitrary list of stipulations associated with them, first invented by Anthony Hecht, Paul Rascal, and John Hollander. The poem is mostly written in dactylic dimeter across its eight lines, though the last line of each quatrain is a choriamb.
Monotetra is a poem form created by Michael Walker. It’s a fairly new form of poetry, which only emerged around 2003. It is composed of quatrains or four-line stanzas written in tetrameter (four feet) and the last line repeats the first four syllables twice.
The blitz is an invented form by Robert Keim that uses minimalism and a unique pattern of repeated words to form up to a 50-line poem with breakneck pacing. It seems to have been initially proposed on a site called “Shadow Poetry” and has since amassed a humble following.
Cascade poems are a new form of poetry invented by Udit Bhatia in 2007. Instead of using meter or rhyme scheme, cascade poems reuse each line of the first stanza as a refrain in the subsequent stanzas. Thus, creating a beautiful “cascading effect”.