Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.

Tenacity - Tenacity is an easy-to-use, privacy-friendly, FLOSS, cross-platform multi-track audio editor/recorder for Windows, macOS, Linux and other operating systems.

AudioMass - A full-featured web based audio editor 🎶

Spek - Spek helps to analyse your audio files by showing their spectrogram.

Sneedacity - Sneedacity is a libre, open-source, and privacy-respecting fork of Audacity.

Leawo Music Recorder - Leawo Music Recorder is a superb but easy-to-use music recording software program that lets you record free music from any built-in input audio, computer audio and online music sources, like YouTube, Spotify, AOL Music, Last.fm, etc.