GNOME Do (also known as simply Do) is a popular free application launcher for Linux by David Siegel. Unlike other application launchers, it not only allows you to search for applications and files but it also allows you to specify actions to perform on search results by providing instantaneous, action-oriented search results that adapt to reflect user habits and preferences.

While it is designed primarily for the GNOME desktop, it works in other desktop environments, such as KDE.

GNOME Do was inspired by Quicksilver for Mac OS X, and GNOME Launch Box.