While this project mainly focuses on open source software, and therefore Linux, some people will still be using Windows. So, I thought I'd make a quick post with some links to music tech applications that can be run on windows along with quick descriptions taken from their Sourceforge pages. Stuff in bold are the ones I recommend.
Audacity
Audacity is a free, easy-to-use audio editor and recorder for Windows, Mac OS X, GNU/Linux, and other operating systems. You can use Audacity to record live audio, convert tapes and records into digital recordings or CDs, edit Ogg Vorbis, MP3, and WAV sound files, cut, copy, splice, and mix sounds together, change the speed or pitch of a recording, and more!
Psycle
Psycle is a Music tracker (like FastTracker 2 or Impulse Tracker) combined with plugin modularity. It supports its own plugin API, the VST2 plugin standard, and a tracker style sampler playback.
VioLet Composer
A cross-platform modular multispace desktop music composer. Features realtime wavelet processing, flexible arrangement, extensible sample types, runtime plugin development, ASIO support, out-of-order PCM processing, autosaving and much, much more.
modplug
Modplug is a 'Win32' X86 based audio application used to produce music. The application was initially a private project developed by Olivier Lapicque and is a popular 'tracker' used by many musicians.
Frinika
Frinika is a free, complete music workstation software for Linux, Windows, Mac OSX Tiger and other operating systems running Java 1.5 (J2SE5.0). It features sequencer, soft-synths, realtime effects and audio recording.
OpenSebJ
An audio production & mixing tool, featuring a - Sequencer, Beat Box, Wave Recording, Frequency Modulation, DJ Scratch interface, MP3 and sampler playback (the ability to assign any sample to any key) - For Windows, written in C# .Net 2.0 with DirectX.
Mixere
Mixere is a standalone Windows application for mixing audio files. It has a spreadsheet-like interface that's ideal for live performance, and especially live sound collage. Imagine unlimited racks full of CD players, all connected to an automated mixer.
ZynAddSubFX
ZynAddSubFX is a powerful realtime, multi-timbral software synthesizer for Linux and Windows. It is microtonal, and the instruments made by it sounds like those from professional keyboards. The program has effects like Reverb, Echo, Chorus, Phaser...
gAlan
gAlan is an audio-processing tool (both on-line and off-line) for X windows and Win32. It allows you to build synthesisers, effects chains, mixers, sequencers, drum-machines etc. etc. in a modular fashion.
For more, just have a browse through the various projects over at Sourceforge.
-Andy