Super Sound - Super Sound is a resourceful audio and music editor.
Audacity - Audacity is a free and open-source audio production software suite that includes a surprising array of editing tools and recording systems.
Reaper - Reaper is a focused digital audio workstation (DAW) developed by Cockos. In the creation of the software, the digital audio technology company intended to make audio editing accessible to the masses.
Add Audio to Video - Add Audio to Video empowers you to add custom audio tracks to your video files.
GarageBand - GarageBand is a fully equipped music creation studio for Mac
Audio Video Editor and Mixer - Audio Video Editor and Mixer is a tool that helps you add changes to your video and audio files.