A free multi-track audio editor and recorder
Audacity is a free, easy-to-use, multi-track audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. The interface is translated into many languages. The version currently hosted here is 2.1.0 (March 2015). More recent versions than this are available from http://www.audacityteam.org/download/ . Audacity is free software, developed by a group of volunteers and distributed under the GNU General Public License (GPL). Programs like Audacity are also called open source software, because their source code is available for anyone to study or use. There are thousands of other free and open source programs, including the Firefox web browser, the LibreOffice or Apache OpenOffice office suites and entire Linux-based operating systems such as Ubuntu
A unified display of relevant technical and tag data for A/V files
MediaInfo is a convenient unified display of the most relevant technical and tag data for video and audio files.
KGuitar is powerful KDE-based music tabulature editor with support of guitar, drums, classic note scores, MIDI synthesizer output, chord, scales, modes, melody and rhythm construction and analysis tools, lots of tab effects, Guitar Pro files import.
BPMMeter is a very simple BPM (Bits per Minute) meter for j2me platform. Setup it on your cellphone and measure BPM whatever you are.
Skyfilesorter is a special file management program specialized for sorting, renaming and merging captured files from DVB-sniffer like Skynet or Manna as well it is also can be used for sorting file garbage on computer
vTune is an open-source pitch correction software.