Applications/Engineering
- HippoDraw - Interactive and Python scriptable data analysis application
 - LabPlot - Data Analysis and Visualization
 - Macaulay2 - System for algebraic geometry and commutative algebra
 - PythonCAD - Python scriptable CAD package
 - R - A language for data analysis and graphics
 - R-BufferedMatrix - A matrix data storage object held in temporary files
 - R-RScaLAPACK - An interface to perform parallel computation on linear algebra problems using ScaLAPACK
 - R-hdf5 - Interface to the NCSA HDF5 library
 - R-mAr - R module to evaluate functions for multivariate AutoRegressive analysis
 - R-multcomp - Simultaneous inference for general linear hypotheses R Package
 - R-mvtnorm - Multivariate normal and T distribution R Package
 - R-systemfit - Simultaneous Equation Estimation R Package
 - R-waveslim - R module, Basic wavelet routines for 1,2 and 3-dimensional signal processing
 - R-wavethresh - R module, Software to perform wavelet statistics and transforms
 - SIBsim4 - Align expressed RNA sequences on a DNA template
 - alliance - Alliance VLSI CAD Sytem
 - avarice - Program for interfacing the Atmel JTAG ICE to GDB
 - avrdude - Software for programming Atmel AVR Microcontroller
 - cdo - A program for manipulating GRIB/NetCDF/SERVICE/EXTRA files
 - drawtiming - A command line tool for generating timing diagrams
 - drgeo - Interactive educational geometry software
 - drgeo-doc - Html documentation for drgeo
 - dx - Open source version of IBM's Visualization Data Explorer
 - elph - Tool to find motifs in a set of DNA or protein sequences
 - extrema - Extrema is a powerful visualization and data analysis tool
 - fityk - Non-linear curve fitting and data analysis
 - freehdl - GPLed free VHDL
 - g3data - Program for extracting the data from scanned graphs
 - galculator - GTK 2 based scientific calculator
 - gchempaint - A 2D chemical formulae drawing tool
 - gdl - GNU Data Language
 - gds2pov - GDS2 layout file to POV-Ray conversion
 - geda-docs - Documentation for gEDA
 - geda-examples - Circuit examples for gEDA
 - geda-gattrib - Attribute editor for gEDA
 - geda-gnetlist - Netlister for the gEDA project
 - geda-gschem - Electronics schematics editor
 - geda-gsymcheck - Symbol checker for electronics schematics editor
 - geda-symbols - Electronic symbols for gEDA
 - geda-utils - Several utilities for the gEDA project
 - genius - An arbitrary precision integer and multiple precision floatingpoint calculator
 - geomview - Interactive 3D viewing program
 - geos - GEOS is a C++ port of the Java Topology Suite
 - gerbv - Gerber file viewer from the gEDA toolkit
 - gimmie - Gnome panel revisited
 - glimmer - System for finding genes in microbial DNA
 - gnome-chemistry-utils - A set of chemical utilities
 - gnucap - The Gnu Circuit Analysis Package
 - gonvert - Units conversion utility
 - gperiodic - Program for browsing the periodic table
 - grace - Numerical Data Processing and Visualization Tool
 - grads - Tool for easy acces, manipulation, and visualization of data
 - grass - GRASS - Geographic Resources Analysis Support System
 - gresistor - Gnome resistor color code calculator
 - gtkwave - Waveform Viewer
 - gts - GNU Triangulated Surface Library
 - harminv - Program and library for solving the harmonic inversion problem
 - hmmer - Profile HMM software for protein sequence analysis
 - iozone - Filesystem benchmarking utility
 - irsim - Switch-level simulator used even for VLSI
 - iverilog - Icarus Verilog is a verilog compiler and simulator
 - kalgebra - MathML-based graph calculator
 - kicad - Electronic schematic diagrams and printed circuit board artwork
 - kpolynome - A polynome calculation program for KDE
 - kst - A data viewing program for KDE
 - ktechlab - Development and simulation of microcontrollers and electronic circuits
 - lagan - Local, global, and multiple alignment of DNA sequences
 - lybniz - A function graph plotter
 - magic - A very capable VLSI layout tool
 - marble - A KDE Desktop Globe
 - maxima - Symbolic Computation Program
 - nco - Suite of programs for manipulating NetCDF/HDF4 files
 - ncview - A visual browser for netCDF format files
 - netcdf - Libraries for the Unidata network Common Data Form (NetCDF v3)
 - netcdf-decoders - Converts WMO GRIB products into NetCDF files
 - netgen - LVS netlist comparison tool for VLSI
 - ngspice - A mixed level/signal circuit simulator
 - octave - A high-level language for numerical computations
 - octave-forge - Contributed functions for octave
 - ogdi - Open Geographic Datastore Interface
 - orpie - A fullscreen console-based RPN calculator
 - osiv - Open Source Image Velocimetry
 - paraview - Parallel visualization application
 - pcb - An interactive printed circuit board editor
 - pharosc - VLSI and ASIC Technology Standard Cell Libraries
 - plplot - Library of functions for making scientific plots
 - polyxmass-bin - The GNU polyxmass software suite
 - proj - Cartographic projection software (PROJ.4)
 - qalculate-gtk - A multi-purpose desktop calculator for GNU/Linux
 - qalculate-kde - A multi-purpose desktop calculator for GNU/Linux
 - qcad - Simple 2D CAD program
 - qfits - A stand-alone general purpose FITS library and command line utilities
 - qgis - A user friendly Open Source Geographic Information System
 - qucs - Circuit simulator
 - scrip - Spherical Coordinate Remapping and Interpolation Package (SCRIP)
 - sdcc - Small Device C Compiler
 - seaview - Graphical multiple sequence alignment editor
 - sextractor - Extract catalogs of sources from astronomical images
 - speedcrunch - A fast power user calculator for KDE
 - tachyon - Parallel / Multiprocessor Ray Tracing System
 - tcd-utils - TCD (Tide Constituent Database) Utils
 - tideEditor - Editor for Tide Constituent Database (TCD) files
 - toped - IC Layout Editor
 - uisp - Universal In-System Programmer for Atmel AVR and 8051
 - wcstools - Software utilities to display and manipulate the WCS of a FITS image
 - wgrib - Manipulate, inventory and decode GRIB files
 - wise2 - Tools for comparison of biopolymers
 - wvs-data - World Vector Shoreline data
 - wxMaxima - Graphical user interface for Maxima
 - xcircuit - Electronic circuit schematic drawing program
 - xdrawchem - 2D chemical structures drawing tool
 - xpa - The XPA messaging system
 - xtide - Calculate tide all over the world