Free verse poetry is a type of poem that doesn’t follow a regular meter or rhyme scheme. In essence, they provide some leeway for poets who don’t want to follow strict poetry rules. Free verse poems don’t necessarily lack structure, although unmetered. This poem type gained prominence in the 19th century.
Rimas Dissolutas is a troubaderic verse form in which verses rhyme with each other instead of having the lines of each verse rhyme internally. A poem in quatrains would have a rhyme scheme of ABCD ABCD, etc. Lines can be of any length but are generally isosyllabic while verses can be any number of lines.
The rondine is a French verse form from around the 16th century that traces its roots to the rondeau, joining a prestigious family of forms that are united by difficult rhyme schemes and heavy use of refrains. The rondine, for its part, is effectively just a shorter rondeau, at 12 lines instead of the usual 15.
The rondeau redouble is essentially a challenging “super rondeau” that extends the form out to 25 lines instead of 15. That, while also demands a tighter structure focused around rhymed quatrains instead of uneven verses, while still utilizing refrains. It was invented by the 16th-century French poet Clement Marot.
The rondelet, not to be confused with the rondel or short rondel, is a seven-line French poem form that utilizes a refrain three times despite its brevity. As a result, the real challenge of the form is often seeing how much the poet can fit within the limited space left behind between the refrains.
The lai is a French form utilizing nine-line verses that are further divided up, structurally, into three-line units. Each verse has an AABAABAAB rhyme scheme, while each three-line unit has a 5-5-2 syllable structure. This makes for a poem form that is demanding, but aesthetically pleasing when properly achieved.
The kyrielle is a stanzaic French poetic form comprised wholly of quatrains. The rhyme scheme can vary from poet to poet but is expected to be present, as is a refrain that will be featured throughout the entirety of the poem as the last line of every verse. Each line of a kyrielle is octosyllabic (eight syllables).
Huitains are eight-line poems that were mostly popular in 16th century Western Europe. They are usually credited to France and generally consist of the first eight lines of the longer ballade form, though there has been some historical experimentation with the rhyme scheme and line lengths of the huitain.
The dansa is a poem from the Old Occipital language, first introduced by the 13th century troubadours of southern France. It utilizes a quintain followed by multiple quatrains, repeating a refrain at the end of every verse. While originally lyric poetry, modern interpretations of the form often lack any definite meter.