GoldWave
Multiple Document Interface for editing dozens of waves in one session. Realtime oscilloscopes.

MixViews
A Unix audio editor designed to process digital sound and other forms of on-disk data.

Barrcode
BCX and BRIAN editing and playout software for radio stations.

Sounds Logical
WaveWarp editor for the PC platform. Audio signal processing and effects.

LeafFX
Digital effects software for musicians. Can work "live" on microphone input, or on prerecorded WAV files.

Sound Forge
Includes an extensive set of audio processes, tools, and effects for manipulating audio.

Celemony Software
Makers of Melodyne, a program that lets you edit audio soundwaves in a piano-roll interface.

Square Circle Software
Audio software and loop tools, automating the process of editing samples.

Glowing Coast Technology
Audio Suite, a multi-track workstation consisting of tightly integrated groups of audio waveform editing tools.

Soundprobe
Sound editing, processing, analysis and effects processor suite.

LDB Loop Creation
Create Stomper and WAV drum loops, adding various effects. Shareware.

Audacity Audio Editor
Free, fully-functional multi-track audio editor for Windows (98 and later), Macintosh (MacOS and OSX), and Linux.

Software Dimensions
Surround Sound digital audio for the PC. Free trial version available.

SAWStudio by RML Labs
Mixing and editing. Demos, free online training.

AudioLabs
Mixing and editing tools for PowerPC and also Windows PC platforms.

Fx Audio Editor
Visually play, record, edit or convert most sound file formats. Add special effects and apply filters.

Maven 3D
Positional 3D audio effects and crosstalk cancellation. Edit in stereo up to 5.1 channels.

Zero-X Audio Software
Create and edit seamless loops and breakbeats.

NGWave
[Win] Sound editing application, record, process, and save sound or music files. Product specifications, screenshots, tutorial, FAQs, and downloads.

Acoustic Labs Audio Mixer
Provides multitrack recording, editing and mixing on the PC. Demo available.

Transposer
Text editor for musicians and amateurs. Extracts chords and texts from karaoke and MIDI files, performs transpositions of key.

RockN Wav
WAV file editor that offers many effects and functions. Freeware.

HairerSoft: Amadeus II
[Mac] Main features, screenshots, download and support area.

Wave Flow
Includes over 60 sound editing functions, effects, tools, and filters.

Acon Digital Media
Develops Acoustica, an audio editor for Windows. Main features, screenshots, purchase information.

Peak
Audio editing, processing and mastering program for Macintosh platform. Features, screenshots, reviews, downloadable trial version.

IpsoLogic
Creates novel sounds. Offers low-level control via an interactive GUI. Free Beta.