Are there many songs people play on guitar that were written for violin? The only ones I can think of are Vivaldi's Four Seasons Summer theme and Paganini's 24th and 5th Caprices.
I like to play Mozart's Concerto No. 3 in G major on guitar. Thais Meditations by Massenet is good too . . . Anything, really.
Hundreds of songs probably, stringed instruments are pretty easy to transpose if your good with music notation.