beaTunes is an iTunes companion app capable of automatically analyzing your music collection to help you build better playlists. It analyzes BPM (beats per minute), silence at the beginning or end of a song, and the color (based on frequency spectrum) of a given song. Some of the data is stored through iTunes, and some is stored by beaTunes itself. beaTunes can suggest albums that would complement your music collection, display music charts, and help you find and fix errors in your song meta data, like typos and wrong genres. It also allows you to blog about selected songs or playlists.
relax is a program designed for the study of the dynamics of proteins and other macromolecules though the analysis of experimental NMR data. It supports exponential curve fitting for the calculation of the R1 and R2 relaxation rates, calculation of the NOE, reduced spectral density mapping, the Lipari and Szabo model-free analysis, study of domain motions via the N-state model (or ensemble analysis) and frame order dynamics theories using anisotropic NMR parameters such as RDCs and PCSs, the investigation of stereochemistry in dynamic ensembles, and the analysis of relaxation dispersion.
getID3() is a PHP script that extracts useful information from MP3s and other multimedia file formats. It extracts information like the play time, bitrate, and resolution from the following file formats: MP3, Ogg Vorbis, WAV, AVI, Matroska (MKV), MPEG-1 video, Windows Media (ASF, WMA, WMV), RealAudio & RealVideo, Monkey's Audio, FLAC & OggFLAC, VQF, Speex, Musepack (MPC), AAC, AU, VOC, AIFF, OptimFROG, WavPack, LiteWave, LPAC, RKAU, SZIP, Shorten, Quicktime, NSV, MIDI, ZIP, ISO9660, TTA, PhotoCD, BMP, PNG, GIF, and JPEG. It parses information from ID3v1, ID3v2, Ogg Vorbis, Lyrics3 v1 & v2, RIFF (AVI, WAV, CDA, CART, BWF), APE, ReplayGain, PNG, and GIF tags, and can write ID3v1, ID3v2, APE2, FLAC, and Ogg Vorbis tags.
DansTuner is a program to tell you if you are playing a pitch in tune. Major features include automatic discovery of which note you are trying to play (good for trumpet, singer, etc.), the ability to play a guide tone at a configurable volume, a graphical moving "needle" with a red/green display and detail about how flat or sharp you are, and an easily configurable background noise threshold.
Twibright Pitchotron analyzes any MP3 into the semitones that are being played, displayed in a scrolling coloured graph on a video. It aids musical transcription. It includes coloured piano key stickers that enable accompanying arbitrary music and improvising even to musical analphabets.