Below are some free audio editors for creating and editing podcasts and screencasts. See more audio editors at alternativeto.net.
Ardour
Ardour is a digital audio workstation (DAW) able to record and edit multiple audio tracks, import videos, and create full compositions. It’s mixer layout and extensive features makes it easier to add and automate background music ready to export to a single audio file.
Download at Ardour.org for Windows, Mac, and Linux.
Audacity
Audacity is a free open source audio editor that allows you to record and edit audio with ease. The waveform visual is always the focus in its clean interface with built-in plugins to enhance your recordings such as compression, noise removal, EQ, and more.
Download at AudacityTeam.org for Windows, Mac, and Linux.
Blender
Blender is primarily a video editor but includes audio editing functions as well. Blender is an all-in-one multimedia editor for the screencast creator.
Download at Blender.org for Windows, Mac, and Linux.
Qtractor
Qtractor is a lesser known open source digital audio workstation (DAW) like Ardour with a workflow similar to Pro Tools.
Download at Qtractor.SourceForge.io for Linux.
Twisted Wave
Twisted Wave is a free web application available at twistedwave.com that can do basic audio editing and effects such as reverb, normalize, and pitch/speed changes.
What free audio editors are we missing from our list? What tasks would you like to see covered with these audio editors? Let us know in the comments below.