Indeed. Nuke is a node-based compositor produced by The Foundry, and used for film and television post-production. Nuke is cross-platform, and is available for Microsoft Windows, Mac OS X, and Linux. Nuke's users include Digital Domain, Sony Pictures Imageworks, Sony Pictures Animation, Framestore, Mr X, Weta Digital and Industrial Light & Magic, and Nuke has been used on productions such as Avatar, The Curious Case of Benjamin Button, King Kong, Jumper, I, Robot, and Resident Evil: Extinction.
Nuke (the name deriving from 'new compositor') was originally developed by Bill Spitzak of Digital Domain for in-house use beginning in 1993. Nuke used the FLTK toolkit, which was developed in-house at Digital Domain and was subsequently released under the GNU LGPL in 1998.