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Sometimes, when you run 2 different .ZIP programs on the same data (PKZIP & KZIP for example), some files get compressed better in one program, while other files get compressed better in the other. ZIPMIX will take the best files from each one and create a new output file, which is guaranteed to be equal to or smaller in size to both of the input files. ZIPMIX can also be used to perform boolean operations on ZIP files, such as merging 2 ZIP files together, or updating a new file (with some tricks).

Zutils is a collection of utilities able to deal with any combination of compressed and non-compressed files transparently. If any given file, including standard input, is compressed, its decompressed content is used. Compressed files are decompressed on the fly; no temporary files are created. The provided utilities are: Zcat - Decompresses and copies files to standard output. Zcmp - Decompresses and compares two files byte by byte. Zdiff - Decompresses and compares two files line by line. Zgrep - Decompresses and searches files for a regular expression. Ztest - Tests integrity of compressed files. Zupdate - Recompresses files to lzip format. The supported compressors are bzip2, gzip, lzip, and xz.

PyEphem provides scientific-grade astronomical computations for the Python programming language. Given a date and location on the Earth's surface, it can compute the positions of the Sun and Moon, of the planets and their moons, and of any asteroids, comets, or earth satellites whose orbital elements the user can provide. Additional functions are provided to compute the angular separation between two objects in the sky, to determine the constellation in which an object lies, and to find the times at which an object rises, transits, and sets on a particular day.

xeartk is a tkgeomap application that uses the geomap::wdgeomap command to create an interactive map. The geographic data is from the xearth root window program. by Kirk Lauritz Johnson in an interactive widget. xeartk is not part of and does not require xearth. It only uses the outline data defined in file mapdata.c of the xearth source distribution. The cities are from factmonster. Adjust the map view by Shift-Double-Clicking or Shift-Dragging. Double click a dot to display information about the city there on the terminal.

Adapted from the Web page: AutoZen generates sounds meant to cause the user's brain waves to shift to a different dominant frequency, resulting in an altered state of consciousness. If you are under treatment for any psychiatric or neurological disorder, you might want to approach this with caution. You must use headphones for AutoZen to work at all. The effect depends on each ear receiving a different tone, and the combination of the inputs in the brain. If you are deaf in one ear, it will not work.

[From the EsounD website:] [W]hen two or more applications want to play sounds at the same time, it's on a first-come, first-served basis. Whoever gets to the audio device first wins. EsounD changes all of that... The Enlightened Sound Daemon mixes several audio streams for playback by a single audio device. You can also pre-load samples, and play them back without having to send all the data for the sound. Network transparency is also built in, so you can play sounds on one machine, and listen to them on another.

forked-daapd is a DAAP (iTunes), MPD (Music Player Daemon) and RSP (Roku) media server. It is a complete rewrite of mt-daapd (Firefly Media Server). It has support for AirPlay devices/speakers, Apple Remote (and compatibles), MPD clients, Chromecast, network streaming, internet radio, Spotify and LastFM. It does not support streaming video by AirPlay nor Chromecast. DAAP stands for Digital Audio Access Protocol, and is the protocol used by iTunes and friends to share/stream media libraries over the network. RSP is Roku's own media sharing protocol. Roku are the makers of the SoundBridge devices.

MPEG Maaate (pronounce: ma:a:it) is a C++ toolkit to parse and analyse audio data in the compressed domain by analysing MPEG-1/2 Layers 1-3 audio files. It makes the encoded fields of an MPEG audio stream accessible (tier1) and provides some content analysis functions like silence detection (tier2). MPEG Maaate is designed in tiers: the first tier implements the parsing of the MPEG audio stream, the second tier implements the content analysis on the extracted field, and the third tier includes any applications that are based on the extracted content.

LASH is a session management system for JACK audio applications. It is an implementation of a proposal that originated from this discussion. Its aim is to allow you to have many different audio programs running at once, to save their setup, close them down and then easily reload the setup at some other time. LASH doesn't deal with any kind of audio data itself; it just runs programs, deals with saving/loading (arbitrary) data and connects different kinds of virtual audio ports together (currently JACK and ALSA sequencer ports). It can also be used to move entire sessions between computers, or post sessions on the Internet for download.

Opus is a totally open, royalty-free, highly versatile audio codec. It is standardized by the Internet Engineering Task Force (IETF) as RFC 6716 which incorporated technology from Skype's SILK codec and Xiph.Org's CELT codec. Opus is designed to handle a wide range of interactive audio applications, including Voice over IP, videoconferencing, in-game chat, and even live, distributed music performances. It scales from low bitrate narrowband speech at 6 kbit/s to very high quality stereo music at 510 kbit/s. Opus uses both Linear Prediction (LP) and the Modified Discrete Cosine Transform (MDCT) to achieve good compression of both speech and music.