 
Open-Source Software at Wikipedia.
FreeCommander - an easy-to-use alternative to the standard windows file manager.
PuTTY - a free Telnet/SSH Client.
Bitvise SSH Client - a free SSH Client.
Clonezilla - A free software disaster recovery, disk cloning and deployment solution.
g4u - Harddisk Image Cloning for PCs.
Linux Live USB Creator - creates portable, bootable and virtualized USB stick running Linux.
LibreOffice - is the power-packed free, libre and open source personal productivity suite for Windows, Macintosh and GNU/Linux.
OpenOffice - The Free and Open Productivity Suite.
Notepad++ - a free source code editor and Notepad replacement that supports several languages.
SCRIBUS - Open Source Desktop Publishing.
Mendeley Reference Manager - organize and search your personal library, annotate documents and cite as you write.
TeX Users Group.
TeXstudio - an integrated writing environment for creating LaTeX documents.
MikTeX is an up-to-date implementation of TeX and related programs for Windows.
TeXnicCenter - premium LaTeX editing for Windows.
Texmaker - free cross-platform LaTeX editor.
TeX Live - a TeX system with binaries for most flavors of Unix, including GNU/Linux, and also Windows.
LEd - LaTeX editor for rapid TeX and LaTeX document development.
LyX - a document processor that combines the power and flexibility of TeX/LaTeX with the ease of use of a graphical interface.
Beamer is a LaTeX class for creating slides for presentations.
BibTeX for Word.
LaTeX Templates.
CutePDF Writer is the free version of commercial PDF creation software.
Ghostscript an interpreter for the PostScript language and for PDF.
GSview is a graphical interface for Ghostscript.
GnuPlot is a portable command-line driven graphing utility for linux, OS/2, MS Windows, OSX, VMS, and many other platforms.
SciDAVis is a free application for Scientific Data Analysis and Visualization.
Veusz is a scientific plotting package.
GIMP is a versatile graphics manipulation package.
XnView is a free software to view, organise, convert graphics and photos files or to create slide show, contact sheet, HTML pages.
Inkscape is an open-source vector graphics editor similar to Adobe Illustrator, Corel Draw, Freehand, or Xara X.
VESTA is a 3D visualization program for structural models, volumetric data such as electron/nuclear densities, and crystal morphologies.
Atomsk is an Open Source command-line program that aims at creating, manipulating, and converting atomic systems.
Bluefish HTML Editor is a powerful editor targeted towards programmers and webdevelopers.
KompoZer is a complete web authoring system that combines web file management and easy-to-use WYSIWYG web page editing.
VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use.
DOSBox is a DOS-emulator.
Bandizip is a lightweight, fast and free All-In-One Zip Archiver.
Adblock Plus - allows one to surf the web without annoying ads.
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