Free guitar tuning software for windows

Find that guitar tab easily from a nifty interface that also remembers your default search engine! (Set that in the preferences.)
Some of the code is based on Chris Beauchamps Guitar Tab Search Widget.

Digital Guitar Tuner - lets you accurately tune your guitar using direct input or microphone. DGT (Digital Guitar Tuner) is a freeware Windows software, easy-to-use and powerful, which lets you accurately tune your guitar using direct input or microphone.
Now it features 27 tuning types!
Here are some key features of "Digital Guitar Tuner":
- High accuracy (uses 16 bit / 44100 Hz input!)
- You can tune guitars with no signal output (through microphone)
- 27 different tuning types (standard, lowered, dropped, open tunings, Hawaiian etc.)
- Modulation of root frequency
- Tuning with midi tones
- Nice and simple environment
System requirements:
- 166 MHz Pentium or equivalent
- 32 MB application RAM
- 5 MB free hard disk space

RoboGuru Guitar Tuner 1.1 is a helpful and convenient to use program to tune your guitar. Just use this freeware and your microphone or line-in. It itakes just one minute. Additionally you can use alternative tunings like "drop D", "+1" etc. Very high accuracy. Freeware.

Requirements: .NET Framework

The Renegade Guitar Tuner was going to be a new feature in Guitar and Drum Trainer 2, but since its only in beta, Ive decided to release it on its own. The Renegade Guitar Tuner is free. Enjoy!
This program is to help you tune your guitar. Just plug-in your guitar to your mic jack and turn up your guitars volume. Helpful instructions can be found inside the software.
Click the "Tune me baby~!" button to start it, and then start plucking strings. Youll have to tune to numbers (e.g. Low E is 82.41 Hz) for the time being (I said it was beta...). All the notes and their values are readily available in the program. Just scroll down in the text box in the program to see them.
The accuracy is good enough, but not perfect. (Hey... Im honest! Try and find another software developer thats half as open as that!) So youll have to tune to the closest value, e.g. tune to 82.10 Hz for low E instead of 82.41 Hz, 196.51 Hz for the G string (my favorite) instead of 196.00 Hz. If youve got perfect pitch, this may be a bit annoying, but then again, if youve got perfect pitch, you dont need a guitar tuner!
Youll need to plug in a mic or directly plugin your guitar to your computers mic jack. You will probably need a connector to help you out with this. Theres some convenient picture help to show you the kid of connector that youll need. (1/4" audio jack to 1/8" audio jack)