Guitar Effects v2.10 - 1MB - Shareware
PC Guitar Effects Software - popular download
http://www.hitsquad.com/smm/programs/Guitar_Effects/

Amazing Slow Downer for Windows - 215K - Shareware
Slow or speed music without changing pitch
http://www.hitsquad.com/smm/programs/AmazingSlowDowner/

Cakewalk Guitar Studio 2 Trial Version - 12.8MB - Trial
Produce guitar-based music with full accompaniment
http://www.hitsquad.com/smm/programs/Guitar_Studio/

Guitar Synth 2.0 - 1.7MB - Shareware
Control the synthesizer in your soundcard or an external synth
http://www.hitsquad.com/smm/programs/GuitarSynth/

ReValver - 4MB - Demo
Emulates vintage guitar amplifiers
http://www.hitsquad.com/smm/programs/ReValver/

Denzo Guitar Software III - 387K - Freeware
All you need to become a complete guitarist!
http://www.hitsquad.com/smm/programs/Denzo/

Guitar Studio 4.5 - 3.1MB - Shareware
Powerful tool set for the musicians playing guitar
http://www.hitsquad.com/smm/programs/GuitarStudio/

NSA Song Player 1.22 - 4.2MB - Shareware
Learn and create songs for the guitar
http://www.hitsquad.com/smm/programs/NSA/

TabIt - 703K - Shareware
Guitar tablature editor, viewer, tuner and player
http://www.hitsquad.com/smm/programs/TabIt/

Mini Guitar Tuner - 70K - Freeware
Tune musical instruments by using a microphone or direct connection
http://www.hitsquad.com/smm/programs/MiniTuner/

More downloads at: http://www.hitsquad.com/smm/win95/GUITAR/

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GUITAR SOFTWARE DOWNLOADS FOR MACINTOSH

Amazing Slow Downer 1.08 - 190K - Shareware
Slow down or speed up music but keep the pitch
http://www.hitsquad.com/smm/programs/Amazing_Slow_Downer/

Guitar Effects Stomp'n FX vol.1 - 1MB - Demo
Real guitar stomp box effects
http://www.hitsquad.com/smm/programs/GuitarEffectsStompn/

GuitarTab 1.0 - 488K - Freeware
Easy entering and playback of guitar tablature
http://www.hitsquad.com/smm/programs/GuitarTab/

Guitar Tuner 4.0 - 146K - Shareware
Visually guides you through the tuning process
http://www.hitsquad.com/smm/programs/Guitar_Tuner/

ChordBook 2.4 - 475K - Shareware
Chord lookup for guitar in standard tuning
http://www.hitsquad.com/smm/programs/ChordBook/

FretPet 2.1.4 - 1.8MB - Shareware
A guitar-oriented musical sequencer
http://www.hitsquad.com/smm/programs/FretPet_mac/

More downloads at: http://www.hitsquad.com/smm/mac/GUITAR/

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GUITAR SOFTWARE DOWNLOADS FOR LINUX

eTktab 2.0 - 25K - Freeware
An ascii tablature editor for guitar and bass guitar
http://www.hitsquad.com/smm/programs/eTktab/

More downloads at: http://www.hitsquad.com/smm/linux/GUITAR/

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GUITAR SOFTWARE DOWNLOADS FOR BEOS

PedalBoard 0.5 - 16K - Freeware
Real-time simulation of a guitar effects processor
http://www.hitsquad.com/smm/programs/PedalBoard/

If you want to look around for more interesting music software, check out The Shareware Music Machine at:
http://www.sharewaremusicmachine.com