Ballad Poems are poems that tells a story similar to a folk tale or legend and often has a repeated refrain. A ballad is often about love and often sung. A ballad is a story in poetic form. A collection of 305 ballads from England and Scotland, and their American variants, were collected by Francis James Child in the late 19th century - an example is shown below.
Langston Hughes , John Greenleaf Whittier,

Free Verse is a form of Poetry composed of either rhymed or unrhymed lines that have no set fixed metrical pattern. The early 20th-century poets were the first to write what they called "free verse" which allowed them to break from the formula and rigidity of traditional poetry. The poetry of Walt Whitman provides many illustrations of Free Verse including his poem "Song of Myself".
T.S. Eliot, Walt Whitman

English (or Shakespearean) sonnets are lyric poems that are 14 lines long falling into three coordinate quatrains and a concluding couplet. Italian (or Petrarchan) sonnets are divided into two quatrains and a six-line sestet.
Shakespeare,
“poems” http://www.types-of-poetry.org.uk/24-free-verse.htm

RUN
I run I run, I even do it for fun
Running is not a sport, but a way of life
Running is what I enjoy to do
Run all day, Run all night
Running is great and a way of life.