Toccata
After the Baroque period composers did not often write toccatas.  The toccata became popular again in the late 19th century with the French organ composers such as Charles-Marie Widor whose Toccata from his Symphony No. 5 is very popular today, especially at weddings.  It has lots of quick notes in the right hand (and occasionally in the left) and a big tune in the pedals.  Another famous organ toccata is by Louis Vierne.  It is the last movement of his Symphony No. 1 (at this time French composers wrote organ works called "symphonies").