My One and Only Love is a popular song (1953) with music written by Guy Wood and lyrics by Robert Mellin. Typically performed as a ballad, it has an aria-like melody that is a challenge to many vocalists.
The song has many cover versions by artists as Frank Sinatra, Charlie Ventura, Sarah Vaughan, Dean Martin, Ella Fitzgerald, Doris, Day, Andy Williams, Louis Armstrong, Rod Stewart, Bob Dylan and many more.

Violin and Guitar. Early intermediate.

With standard notation and Tablature (TAB). With chord. With lyrics and melody line.

Pages : Seven (7) pages. (4 pages full score, 1 page Violin part, 2 pages guitar with tab).

A 19th century folklore for Violin and piano duet.
With downloadable mp3 for audio-help.
Piano early intermediate, Violin easy.
Pages: 2 pages Violin and Piano score.

More is one of Ortolani's acclaimed and influential works. It was nominated for the Academy Award for Best Original Song at the 36th Academy Awards in 1964, where it was performed in english by Katyna Ranieri.
For duet  Violin and fingerstyle guitar (acoustic guitar or classical guitar).
Violin : Easy, Guitar : Early intermediate.
With guitar tablature. With lyrics. With melody line.
Pages: 3 pages (2 pages score and 1 page Volin part) 2:05' min.

Molly Malone (also known as Cockles and Mussels) is a traditional Irsish song.

For Violin and Guitar duet or Violin Guitar and voice.
With some finger position suggestions. With melody line and lyrics.
With standard notation and tablature. With downloadable mp3 just for audio help.

Easy to early intermediate.
Pages: Three (3) pages,   (2 pages Melody/Violin and Guitar with tab, 1 page Violin part ).

A beautiful Minuet for Flute, Viola and Guitar by Carl Maria von Weber (1786-1826).
Five pages all instruments, two pages Flute part, two pages Viola part, two pages Guitar part, 11 pages total.
With downloadable mp3 for audio help., 4:30' min.