EzyTuner Guitar Tuner
EzyTuner is a fast, accurate instrument / guitar tuner and metronome. Using your microphone it automatically detects the frequency of the instrument and calculates the note, so there is no need to tune by ear. Use it as a guitar tuner, bass tuner or even your singing voice. ... Why pay $100s for a guitar tuner when you can get one this cheap with a free metronome.
http://www.ezytuner.com/Downloads/ETsetup.exe - 608Kb - Download - Screenshot

The 'e' Chromatic Tuner
The 'e' Chromatic Tuner offers an incredible value proposition: An effective, lightweight and easy-to-use instrument tuning program in exchange for absolutely nothing.
http://home.primus.ca/~kmacleod/etune09.zip - 71Kb - Download - Screenshot

enable TunerCE
enable TunerCE is a powerful instrument tuner which provides high precision tuning on handheld PCs. The tuner provides real-time tuning for a range of instruments, including presets for a number of string and wind instruments in a range of styles and transpositions. ... The tuner will also determine your instrument's current frequency, corresponding musical note and even octave offset to aid you in transcripting pieces you don't have sheet music for.
http://www.enablesoftware.com/TunerCE.exe - 338Kb - Download - Screenshot

Resource Tuner Console
Resource Tuner Console is a tool that enables developers to automate editing of resources in 32 and 64-bit Windows executables. This command-line resource editor allows using VBScript to create a repeatable process for updating and customizing resources during the final stage of the build... Sample scripts illustrated the main features can be found within the Resource Tuner Console package. ... All the functionality of Resource Tuner Console is called from within your VBScript. ... Resource Tuner Console fully supports Unicode and lets you add, edit or delete strings in multiple languages,...
http://www.heaventools.com/download/rtc_setup.exe - 2Mb - Download - Screenshot

Guitar online tuner
Guitar Tuner. Use this flash to get your guitar in perfect tune! Click on the chords to hear the perfect note.
http://www.flashmusicgames.com/gtf.zip - 50Kb - Download - Screenshot

enable Guitar Tuner
enable Guitar Tuner performs real-time tuning for a range of instruments, as well as presets for each instrument in a variety of styles. You can transpose, use common jazz and orchestra references or even enter your own custom frequencies for unlimited flexibility. ... enable Guitar Tuner automatically determines your instrument / string's current frequency to high accuracy, and tells you the corresponding musical note. ... Learn to "tune by ear" using the Play Tone feature, which generates the note you are trying to play while you tune to it.
http://www.enableencore.com/encore/GuitarTunerDemo.exe - 4Mb - Download - Screenshot

Resource Tuner
Resource Tuner enables you to customize your favorite programs by modifying the executable file (EXE, DLL, SYS, MSSTYLES, SCR and more) resources. Resource Tuner makes it a snap to replace them with other images, texts and sounds more to your liking. ... Resource Tuner offers a thorough look at all of the resources (bitmaps, jpeg, png, xml, icons, strings, etc) in the file, and allows you to make modifications without needing to recompile the source code. ... Because Resource Tuner has itself been written using Delphi, there's a very strong emphasis on peeking inside Delphi applications...
http://www.heaventools.com/download/rtsetup.exe - 2Mb - Download - Screenshot

Mac classic Guitar tuner
Free guitar tuner, for tuning acoustic and electric guitars, from GCH Guitar Academy. Has a selection of tones to tune from, electric guitar, acoustic guitar and pure tone. Best of all it's completely FREE.
http://www.gch-guitaracademy.co.uk/freeware/mac/tuner_mac.zip - 3Mb - Download - Screenshot

Mac OSX Guitar tuner
Free guitar tuner, for tuning acoustic and electric guitars, from GCH Guitar Academy. Has a selection of tones to tune from, electric guitar, acoustic guitar and pure tone. Best of all it's completely FREE.
http://www.gch-guitaracademy.com/freeware/mac/tuner_osx.zip - 3Mb - Download - Screenshot

In-Tune Multi-Instrument Tuner
Tune your musical instrument quickly and accurately with this digital tuner. Uses microphone or direct electric guitar input for tuning. You can tune guitar, bass guitar, banjo, mandolin, violin, viola, cello, double bass, and other instruments using the pitch selector. ... Has choice of gauge and pitch graph views.
http://www.musicmasterworks.com/intune19.exe - 650Kb - Download - Screenshot