Gadfly

Gadfly can refer to:

Gadfly, a type of fly typically belonging to either the genus Tabanidae or Oestridae
Gadfly (database), a relational database in the Python programming language
Gadfly (social), a term for people who upset the status quo
Gadfly Records, an independent record label
gadfly petrels, a group of petrels in the genera Bulweria and Pterodroma.
SA-11 "Gadfly" (see Novator KS-172 AAM-L) is the NATO reporting name for a particular Russian surface-to-air missile
The Gadfly, a novel by Ethel Lilian Voynich
The Gadfly Suite, a musical suite by Dmitri Shostakovich for one of the films based on the novel The Gadfly