MPICH is a high-performance and portable implementation of the Message Passing Interface (MPI) standard (MPI-1, MPI-2 and MPI-3). MPICH provides an MPI implementation that efficiently supports different computation and communication platforms including commodity clusters, high-speed networks (10 Gigabit Ethernet, InfiniBand, Myrinet, Quadrics), and proprietary high-end computing systems (Blue Gene, Cray). It enables research in MPI through a modular framework for other derived implementations.

This package provides Zyn-Fusion user interface for zynaddsubfx.

GNU Mtools is a set of utilities for accessing MS-DOS disks from a GNU or Unix system. It supports long file names and multiple disk formats. It also supports some FAT-specific features such as volume labels and FAT-specific file attributes.

GNU MPC is a C library for performing arithmetic on complex numbers. It supports arbitrarily high precision and correctly rounds the results.

The GMP library performs arbitrary-precision arithmetic on signed integers, rational numbers and floating point numbers. The precision is only limited by the available memory. The library is highly optimized, with a design focus on execution speed. It is aimed at use in, for example, cryptography and computational algebra.

MPFI is a portable C library for arbitrary-precision interval arithmetic, with intervals represented using MPFR reliable floating-point numbers. It's based on the GMP and GNU MPFR libraries.

The purpose of arbitrary-precision interval arithmetic is to get results that are both guaranteed, thanks to interval computation, and accurate, thanks to multiple-precision arithmetic.

LibTomMath is a portable number theoretic multiple-precision integer library written entirely in C. It's designed to provide an API that is simple to work with that provides fairly efficient routines that build out of the box without configuration.

This package supports both a double-double datatype (approx. 32 decimal digits) and a quad-double datatype (approx. 64 decimal digits). The computational library is written in C++. Both C++ and Fortran-90 high-level language interfaces are provided to permit one to convert an existing C++ or Fortran-90 program to use the library with only minor changes to the source code. In most cases only a few type statements and (for Fortran-90 programs) read/write statements need to be changed. PSLQ and numerical quadrature programs are included.

CLN is a C++ library for efficient computations with all kinds of numbers in arbitrary precision. It provides a rich set of number classes and elementary, logical and transcendental functions.

TomsFastMath is a large integer library written in portable ISO C. It is a port of LibTomMath with optional support for inline assembler multiplies.

LibTomCrypt is a fairly comprehensive, modular and portable cryptographic toolkit that provides developers with a vast array of well known published block ciphers, one-way hash functions, chaining modes, pseudo-random number generators, public key cryptography and a plethora of other routines.

iRRAM is a C++ package for error-free real arithmetic based on the concept of a Real-RAM. Its capabilities range from ordinary arithmetic over trigonometric functions to linear algebra and differential equations. A program using iRRAM is coded in ordinary C++, but may use a special class that behaves like real numbers without any error. Additionally, iRRAM uses the concept of multi-valued functions.

The GMP library performs arbitrary-precision arithmetic on signed integers, rational numbers and floating point numbers. The precision is only limited by the available memory. The library is highly optimized, with a design focus on execution speed. It is aimed at use in, for example, cryptography and computational algebra.

GNU MPFR is a C library for performing multiple-precision, floating-point computations with correct rounding.

Surge is a subtractive hybrid digital synthesizer. Each patch contains two scenes which are separate instances of the entire synthesis engine (except effects) that can be used for layering or split patches.

This package provides an LV2 plugin that allows for pattern-controlled MIDI amp & time stretching to produce shuffle / swing effects.

Key features include:

1. MIDI velocity amplification and timing manipulation plugin

2. Swing and shuffle rhythms

3. Pre-generator dynamics

4. Tempo rubato

5. Pattern (sliders) or shape-controlled

6. MIDI filters

7. Smart quantization

Stargate is a digital audio workstation with built-in instrument and effect plugins and wave editor, providing innovative features, especially for EDM production.

Samplv1 is an old-school polyphonic sampler synthesizer with stereo effects.

This package provides the LV2 plugin "GxSlowGear", a slow gear audio effect to produce volume swells.

Rosegarden is a music composition and editing environment based around a MIDI sequencer that features a rich understanding of music notation and includes basic support for digital audio.

The Sherlock plugin bundle contains LV2 plugins for visualizing LV2 atom, MIDI and OSC events. They can be used for monitoring and debugging of event signal flows inside plugin graphs.

Drumkv1 is an old-school drum-kit sampler synthesizer with stereo effects.

A semi-modular software synthesizer and fx plugin

This package provides an Emacs major mode for editing GNU LilyPond music scores.