EVERYTHING!
Some popular pieces of music written specifically for the B-flat clarinet include Mozart's Clarinet Concerto in A major, Copland's Clarinet Concerto, and Weber's Clarinet Concerto No. 1.
Roger Nixon has written: 'Four duos, for flute or oboe and Bb clarinet' -- subject(s): Arranged Clarinet and flute music, Clarinet and flute music, Arranged
Arguably, Mozart's Clarinet Concerto.
Edwin Carr has written: 'Aubade, for clarinet and piano' -- subject(s): Clarinet and piano music
The most famous clarinet works are the Mozart Clarinet Concerto and all the Weber Concertos.
Some popular pieces of clarinet music frequently performed in orchestras include Mozart's Clarinet Concerto in A major, Copland's Clarinet Concerto, and Weber's Clarinet Concerto No. 1 in F minor.
Mozart, Weber, Gershwin
There isn't alot
You will have to get some lessons from a music teacher. = D
If you mean how the music is composed, then it's written in the same manner as any other instrument. Of course, whoever is writing the music has to be familiar with the range of the clarinet along with other "nuances" that the instrument presents.
The clarinet can be used in any style of music
Transposition for the bass clarinet involves playing music written in a different key than the instrument's sounding pitch. The bass clarinet is a transposing instrument, meaning that when it plays a written C, it sounds as a concert B-flat. This requires the player to read music in a different key than it is written in to produce the correct pitches.