Gadfly most commonly refers to: Horse fly or botfly Gadfly (philosophy and social science), a person who upsets the status quo
Gadfly may also refer to:
Entertainment
The Gadfly, an 1897 novel by Ethel Lilian Voynich
The Gadfly (play), an 1898 play by George Bernard Shaw
The Gadfly (1928 film), a Soviet film by Kote Marjanishvili
The Gadfly (1955 film), a Soviet film by Aleksandr Fajntsimmer
The Gadfly Suite, a musical suite by Dmitri Shostakovich for the 1955 film
The Gadfly (1980 film), a Soviet film by Nikolai Mashchenko
The Gadfly (opera), a 1958 Russian opera by Antonio Spadavecchia
Gadfly Online, an online and print magazine
The Gadfly (Adelaide), a 1906–1909 Australian literary magazine produced by C. J. Dennis The Gadfly (album), a 2003 album by LPG The Gadfly, a fictional play in the novels of Geoffrey Trease, see The Hills of Varna
Other uses
Gadfly (database), a relational database management system
Gadfly (mythology), the insect as sent by Hera to torment Io in Greek mythology
Gadfly, the NATO reporting name for a Russian 9K37 Buk surface-to-air missile system Education Gadfly, the weekly e-bulletin of the Thomas B. Fordham Institute Autism's Gadfly, a blog maintained by Jonathan Mitchell (writer) A package for plotting and data visualisation written in Julia.