The Advanced Linux Sound Architecture is composed of several parts. The first is a fully modularized sound driver which supports module autoloading, devfs, isapnp autoconfiguration, and gives complete access to analog audio, digital audio, control, mixer, synthesizer, DSP, MIDI, and timer components of audio hardware. It also includes a fully-featured kernel-level sequencer, a full compatibility layer for OSS/Free applications, an object-oriented C library which covers and enhances the ALSA kernel driver functionality for applications (client/server, plugins, PCM sharing/multiplexing, PCM metering, etc.), an interactive configuration program for the driver, and some simple utilities for basic management.
AlsaPlayer is a new PCM player written with the ALSA sound system in mind. It also includes support for JACK, OSS, NAS, and ESD. It makes extensive use of multi-threading and supports OGG, MP3, WAV, CDDA (CD Digital Audio), MOD, S3M, IT, and many other input types. Features include a real- time effects stream, variable speed/pitch control, SHOUTcast/icecast streaming support, multiple active visual scopes, command line mode, playlists, plugin architecture, low-latency mode, and more.
Althea is an IMAP email client for X that uses the GTK widget set. It was built with the IMAP protocol in mind in order to avoid many of the pitfalls experienced by POP clients that added IMAP support. Althea allows easy access to a nearly unlimited number of servers, and has a very small memory footprint. As of version 0.5.0 Althea also supports IMAP over SSL.
AMaViS (A Mail Virus Scanner) scans e-mail attachments for viruses using third-party virus scanners available for UNIX environments. It resides on a UNIX (Linux) machine and looks through the attached files arriving via e-mail, generates reports when a virus is found and sets the delivery on hold.
amber aims to be an easy-to-use granular synthesis tool for Linux to assist composers and electronic musicians in creating interesting and complex sounds. More information on the theory and application of granular synthesis techniques can be found at http://shoko.calarts.edu/~eric/gs.html.
AMMP (another molecular mechanics program) is a full-featured molecular modeling package. Notable features include the use of the fast multipole method for calculations using all pairs of atoms, stiffly stable dynamics, embedding and other strategies for robust building of model structures from limited data.
Anacron is a periodic command scheduler. It executes commands at intervals specified in days. Unlike cron, it does not assume that the system is running continuously. It can therefore be used to control the execution of daily, weekly, and monthly jobs (or anything with a period of n days), on systems that don't run 24 hours a day. When installed and configured properly, Anacron will make sure that the commands are run at the specified intervals as closely as machine-uptime permits.