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media-video/aegisub

Advanced subtitle editor

dev-cpp/eigen

C++ template library for linear algebra

media-tv/mythtv

Open Source DVR and media center hub

sci-chemistry/gromacs

The ultimate molecular dynamics simulation package

media-gfx/imagemagick

A collection of tools and libraries for many image formats

dev-lang/gdl

GNU Data Language

sci-geosciences/gmt

Powerful map generator

sci-mathematics/octave

High-level interactive language for numerical computations

sci-visualization/gwyddion

Framework for Scanning Mode Microscopy data analysis

sci-visualization/grace

Motif based XY-plotting tool

media-gfx/asymptote

A vector graphics language that provides a framework for technical drawing

media-gfx/blender

3D Creation/Animation/Publishing System

net-analyzer/httping

http protocol ping-like program

media-sound/snd

Snd is a sound editor

media-sound/lingot

Accurate, easy to use, and highly configurable musical instrument tuner

sci-physics/root

C++ data analysis framework and interpreter from CERN

media-libs/aubio

Library for audio labelling

media-libs/vips

VIPS Image Processing Library

media-libs/vigra

C++ computer vision library emphasizing customizable algorithms and structures

media-libs/libxtract

A simple, portable, lightweight library of audio feature extraction functions

dev-python/cvxopt

Python package for convex optimization

sci-physics/espresso

Extensible Simulation Package for Research on Soft matter

media-gfx/gmic

GREYC's Magic Image Converter

sci-visualization/labplot

Scientific data analysis and visualisation based on KDE Frameworks

dev-libs/starpu

Unified runtime system for heterogeneous multicore architectures

sci-electronics/ngspice

The Next Generation Spice (Electronic Circuit Simulator)

sci-libs/itk

NLM Insight Segmentation and Registration Toolkit

dev-libs/libdynd

C++ dynamic multi-dimensionnal array library with Python exposure

media-gfx/krita

Free digital painting application. Digital Painting, Creative Freedom!

media-sound/supercollider

Environment and programming language for real time audio synthesis

media-sound/pure-data

Visual programming language for multimedia

media-radio/tucnak

Amateur Radio VHF Contest Logbook

sci-mathematics/petsc

Portable, Extensible Toolkit for Scientific Computation

media-plugins/vapoursynth-dfmderainbow

A derainbow function for VapourSynth

sci-geosciences/grass

A free GIS with raster and vector functionality, as well as 3D vizualization

media-plugins/gimp-plugin-astronomy

Gimp plugins for astronomical image processing

sci-libs/lalapps

Applications for gravitational-wave data analysis with LIGO/Virgo

media-plugins/vapoursynth-havsfunc

HolyWu's ported AviSynth scripts for VapourSynth

media-sound/pulseaudio-daemon

Daemon component of PulseAudio (networked sound server)

media-sound/catnip

terminal audio visualizer

media-libs/audaspace

A high level and feature rich audio library written in C++ with language bindings