LMMS is a free and open source digital audio workstation software that allows users to produce electronic music on their computers. It provides tools for creating melodies and beats, synthesizing and mixing sounds, and arranging samples. Some key features of LMMS include a song editor, beat and bassline editor, piano roll, effects mixer, and support for instrument plugins and file formats like MIDI and SoundFont. LMMS is available for Linux, Windows, and macOS and provides a free alternative to professional digital audio workstation software like FL Studio.