Kwave

AudioDesk provides all of the high-end features you'd expect in a professional workstation application, like 24-bit/192-kHz recording and real-time, 32-bit effects processing. The software includes multi-track audio editing, sample-accurate placement of audio, a complete virtual mixing environment with up to 64 stereo busses, automated mixing, graphic editing of mix and effects automation, scrubbing, trimming, spotting, crossfades, support for third-party AU, VST2, and MAS effects plug-ins, unlimited digital track bouncing (including effects and automation), and much more. AudioDesk does not place artificial restrictions on the number of tracks you can work with. Unlimited audio tracks means AudioDesk is ready for as many tracks as your computer will allow. Unlike other audio sequencers, AudioDesk places no limits on the number of tracks you can use simultaneously.

Wavosaur is a cool free sound editor, audio editor, wav editor software for editing, processing and recording sounds, wav and mp3 files. Wavosaur has all the features to edit audio (cut, copy, paste, etc.) produce music loops, analyze, record, batch convert. Wavosaur supports VST plugins, ASIO driver, multichannel wav files, real time effect processing. The program has no installer and doesn't write in the registry. Use it as a free mp3 editor, for mastering, sound design. The Wavosaur freeware audio editor works on Windows 98, Windows XP and Windows Vista. Go to the features page for an overview of the software. All classic editing functions, cut, copy, paste, paste mix, paste replace/insert, paste to new file, trim/crop, delete, undo. Many processing options, mute, channel convert (stereo->mono, mono->stereo), insert silence, change volume, normalize level, fade in/out, invert/flip, undo.