Accelerando is a musical metronome that can speed up, allowing you to practice your music at progressively faster tempos. For example, you could set it to play 60 beats per minute for 4 bars, then automatically speed up by 10 beats per minute, and so on.
Clamor is software for musical ear training. It runs on Unix. It's written to be as platform-independent as possible, so it might even run on Windows without modification.
ctronome plays user selectable 44100Hz 16bit mono WAV sample via /dev/dsp, so you could just record your favourite metronome and have ctronome play it back at desired BPM.
GTick is a metronome application written for GNU/Linux and other UN*X-like operting systems supporting different meters (Even, 2/4, 3/4, 4/4 and more) and speeds ranging from 10 to 1000 bpm. It utilizes GTK+ and OSS (ALSA compatible).
GtkGuitune is open source software for tuning guitars and other instruments by using the method of Schmitt-triggering. Read more
Guitarix is an open source, versatle, virtual guitar amplifier running with jack (Jack Audio Connection Kit), a professionally-capable audio/MIDI server and master transport control. Read more
Hound Dog is a small KDE application that can be used as an instrument tuner or just in general to identify the pitch of an input signal.
klick is an advanced JACK-based metronome, supporting tempo changes, meter changes, and more.
Klicker is a KDE/QT based metronome that supports from 30 to 208 beats per minute, duple, tuple, and quartal time, and has DCOP interfaces for interprocess control.
LinABX is a software tool to aid in determining audibility of audio artifacts. In order to do so, a technique called 'double blind testing' is used. The listener gives two audio samples. One 'original' and one modified by the device or algorithm under test. These samples are usually called 'A' and 'B'. LinABX will then choose one out of these two. This unknown sample is usually called 'X'. The listener should now try to answer the question "Is X closer to 'A' or to 'B'?".
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. Read more
PhatBeat is a cross-platform (Linux and Windows) beat counter for use by collectors, producers, DJs, and others interested in beat-oriented music. For now it requires users to tap in the beat during listening, after which it calculates and displays the track's BPM and the size of a measure in seconds.
Pitchtune is a GPL'ed GTK oscilloscope-style musical instrument tuning program. It can also be used to find the frequency of sounds.
Polygnome is a polyrhythmic metronome. It allows musicians to practice complex polyrhythms, such as 5 against 4 against 7.
QMetronome is a metronome for Linux using Qt and SDL. It is skinnable. It has customizable sounds (beat / accented beat / first beat).
QTuneroid is an instrument tuner for linux, using Qt for its UI and ALSA for sound input. It is a fork of Tuneroid software for KDE, made because i cannot found good and recent tuner without KDE dependency.
tuneit is a simple command-line instrument tuner for Linux. It uses the floating-point version of FFTW3 and in-place transforms for better performance when using the FFT algorithm.
tuneroid is a tuner for variety of musical instruments. It is designed to tune musical instruments on PC using a microphone or directly connecting the instrument to the PC's sound card.