Audacity is free, open source software for recording and editing sounds. You can use Audacity to record live audio, convert tapes and records, edit sound files, change the speed or pitch of a recording and much more.
Carla is an audio plugin host, with support for many audio drivers and plugin formats. It has some nice features like automation of parameters via MIDI CC (and send output back as MIDI too) and full OSC control.
DarkAudacity is a build/fork of the the well known free sound editor, Audacity, customized with a darker, more modern theme - and a few small tweaks. The audio engine underneath is the same audio engine. The same code powers it. Like Audacity, it is completely free.Discontinued
The project seems no longer developed since 2019. Last version, 2.3.2, released in May 2019, can be still downloaded from FossHub. The GitHub page shows an older version (2.1.3) that dates back to 2016.
VB-Audio CABLE is a Windows Audio Driver working as a Virtual Audio Cable. After installing the VB-CABLE driver, a new playback device appears in the audio device list and can be set as default device. VB-CABLE can be set as the default device, just like any regular audio device.
Audacium is an easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. Developed by a group of volunteers as open source.
AudioMass lets you record, or use your existing audio tracks, and modify them by trimming, cutting, pasting or applying a plethora of effects, from compression and paragraphic equalizers to reverb, delay and distortion fx.
Sneedacity (named after Sneed's Feed and Seed from The Simpsons episode, "E-I-E-I-D'oh") is a free (libre), open source, and privacy-respecting audio recording and editing suite forked from Audacity.
WaveShop is a free, open-source audio editor for Windows XP/Vista/7. WaveShop is fast, lightweight, and bit-perfect, meaning samples aren't altered unless they need to be. Editing a portion of an audio file only affects that portion; the rest of the file is untouched.Discontinued
The program is no longer updated. Last version, 1.0.14, released in November 2013, can be still downloaded from the official website.