This is the software publishers description:

LINGOT is a musical instrument tuner. It's accurate, easy to use, and highly configurable. Originally conceived to tune electric guitars, its configurability gives it a more general character.

It looks like an analogic tuner, with a gauge indicating the relative shift to a certain note --found automatically as the closest note to the estimated frequency--, indicating that note and its frequency.

The note will be found automatically, since the program hasn't any manual function mode (indicating the note to tune manually), for maintaining its general purpose.

We recommend using the tuner in conjunction with a sound mixer for selecting the desired recording source and the signal recording levels.

Features:

• Accurate.
• Easy to use. Just plug in your instrument and run tuner.
• Highly configurable via GUI. It's possible to change any parameter while the program is running, without editing any file.
• It works in an automatic way. It isn't necessary specify the note to tune; the program guesses it.
• It's free software. It has GPL license.
• Tuning other instruments than guitars is possible. Since this program guesses the note you are playing, it can be used to tune a piano, a bass, a violin, etc.