VideoMeld is a complete multitrack video and audio editor. Use it to mix any number of video and audio files into a single file, create presentations with background music and video effects, edit YouTube movies, and much more.
MultitrackStudio is an audio / midi recording and mixing environment for Windows targeted at home recording musicians.
Powerful multitrack audio editor supporting a variety of formats
Tk Ecasound is a Tcl/Tk front end for Ecasound.
A free, cross platform multitrack audio recording and editing suite.
Record voiceovers or overdub tracks quickly & easily. Create your own soundtracks, advertisements, & voiceovers with Overdub! True two-track recording & mixing with complete control over final mix. Easy settings with punch in and punch out markers.
Virtual multitrack digital audio workstation
Mixere is a free Windows application for mixing audio files. Its simple, spreadsheet-like interface is ideal for live performance, and especially sound collage. Dynamic looping, fully automated sliders, gradual mute/solo operations, and more.