Free
Exactly as the title implies. It’s all Free. Enjoy.
MuseScore is a free cross-platform WYSIWYG music notation program that offers a cost-effective alternative to commercial programs such as Sibelius and Finale. You can print beautifully engraved sheet music or save it as PDF or MIDI file.
Special Features Include:
WYSIWYG, notes are entered on a “virtual note sheet”
Unlimited number of staves
Up to four voices per staff
Easy and fast note entry with your keyboard, mouse, or MIDI keyboard
Integrated sequencer and FluidSynth software synthesizer
Import and export of MusicXML and Standard MIDI Files
Available for Windows, Mac and Linux
Translated in 43 languages
GNU GPL licensed
They also have loads of plugins that can be used with the software.
Visit the MuseScore website for more information and to download the software.
Jokosher is a simple and powerful multi-track studio. Jokosher provides a complete application for recording, editing, mixing and exporting audio, and has been specifically designed with usability in mind. It’s also great for creating podcasts.

8kut is a 8-band frequency cutter freeware designed with DJ’s and live performance in mind. It cuts frequencies across the spectrum from bass to mids, and high mids to treble.
Some of the specs include:
8 bands frequency cutter
Phase inverter, Effect bypass, Gain boost
Full MIDI automation support
Works in mono or stereo
32 Factory presets
Comes with user manual
and more…

8eqp is a fully parametric 8 band equalizer with a fixed center frequency range. Each band offers Q-factor, gain and center frequency controls. 8eqp comes with MIDI automation support, the ability to undo your changes, and oversampling for clearer sound.
Some of the specs include:
Equalize on 8 band with fixed center frequency range
Q and Gain control on each band
Output gain control from -∞ to +5dB
Phase inverter and Effect bypass
Support any sample rate
No latency
and more…
Visit Tek’it Audio site for more details and information on their line of products. Looks like they’ve got some great stuff over there!!!

mp3DirectCut is a fast and extensive audio editor and recorder for compressed mp3. You can directly cut, copy, paste or change the volume with no need to decompress your files for audio editing. This saves encoding time and preserves the original quality, because nothing will be re-encoded. The built in recorder creates mp3 on the fly from your audio input. Using Cue sheets, pause detection or Auto cue you can easily divide long files.
Features:
Non-destructive cut, copy, paste
Volume change, fade, normalize, pause detection
mp3 recording with ACM or Lame encoder
Fast mp3 visualisation and easy navigation
Supports Layer 2 (dvd/dvb audio)
ID3v1.1 tag editor · ID3v2 tag keeping
Cue Sheet support
Auto cue (track dividing by time values)
Track splitting with filename and tag creation
Trim · Crop · Fast play · Loop play
VU meter, bitrate visualisation
High speed recorder · Command line usage
System Requirements
300 MHz CPU · Windows or Linux with Wine
mp3 ACM codec (present in XP/Vista) or mpglib.dll
For mp3 recording: encoding ACM or Lame encoder DLL, >500MHz