LMMS

LMMS is a free, open-source, and multiplatform digital audio workstation, designed by musicians for musicians. It provides a complete suite for music production on Windows, Linux, and macOS. You can compose, sequence, mix, and automate songs within a single, user-friendly interface. Create melodies and beats with the Beat+Bassline Editor, and fine-tune patterns and chords using the powerful Piano Roll Editor.

Key features include:

• Versatile Instruments: Comes with 16 built-in synthesizers, including emulations of classic hardware like the Roland TB-303 and Commodore 64 SID. It offers full support for 64-bit VST instruments and SoundFont (SF2) files.
• Effects & Mixing: Features a built-in mixer with support for LADSPA and VST effect plug-ins. It includes essential effects like compressor, limiter, delay, reverb, distortion, and EQs.
• Simple Workflow: Play notes via MIDI or a standard typing keyboard. Easily import MIDI files and Hydrogen project files to integrate existing work.