Handel’s compositions include 42 operas, 29 oratorios, more than 120 cantatas, trios, and duets, numerous arias, chamber music, a large number of ecumenical pieces, odes and serenatas, and 16 organ concerti.

His oratorio Messiah, with its “Hallelujah” chorus, is among the most famous Baroque works and is a popular choice for performances during the Christmas season. Among Handel’s best-known instrumental works are the Concerti Grossi Opus 3 and 6, “The Cuckoo and the Nightingale,” in which birds are heard calling during passages played in different keys representing the vocal ranges of two birds, and his 16 keyboard suites, especially The Harmonious Blacksmith.

Collected editions of Handel’s works include the Händel-Gesellschaft and the Hallische Händel-Ausgabe, however the more recent Händel-Werke-Verzeichnis publication is now commonly used to number his works. For example, Handel’s Messiah can be referred to as HG xlv, HHA i/17, or HWV 56. Some of Handel’s music is also numbered based on initial publications. For example, a 1741 publication by Walsh labelled twelve of Handel’s concerti grossi as Opus 6.—Excerpted from Wikipedia

Handel produced hundreds of pieces over his career. Access complete list on Wikipedia.