The software presented on this page has proven useful for everyday work. This list cannot be complete, and it does not want to be. Instead, it is a variety of free (or even open source / OSS) software which can replace widely used commercial products regarding functionality and usability. Additions and requests are always welcome.

Chemistry

	program	use	replacement for	OS	license
	Marvin Sketch	chemical drawing, converter, utilities	ChemDraw		Freeware
	ACD ChemSketch	chemical drawing	ChemDraw		Freeware
	Avogadro	3D molecule editor, Gaussian frontend	HyperChem (im Aufbau)		OSS
	Jmol	visualization, 3D animationen, Povray-Frontend	-		OSS
	POV-Ray	raytracing (molecule rendering)	-		OSS
	QtiPlot	data ananalysis and plotting	Origin		OSS
	nmrdb.org	NMR prediction	ChemOffice		Website

Office

	program	use	replacement for	OS	license
	LibreOffice	office suite	MS Office		OSS
	PDF Xchange Editor	PDF reader, editor, printer	Adobe Reader		Freeware
	JabRef	reference manager	EndNote		OSS
	MiKTeX	LaTeX distribution	-		OSS
	TeXnic Center	LaTeX editor	-		OSS
	Calibre	e-book library, editor, converter	Kindle, Adobe Digital Editions		OSS

Utilities

	program	use	replacement for	OS	license
	Total Commander	file manager	Windows Explorer		Shareware
	7zip	compression	-		OSS
	Geany	text editor	UltraEdit		OSS
	Notepad ++	text editor	UltraEdit		OSS
	Cygwin	linux commands on windows	-		OSS
	AdoptOpenJDK (Java Runtime Environment)	java runtime	-		OSS
	KeePassXC	password management	-		OSS

Internet

	program	use	replacement for	OS	license
	OwnCloud	file synchronization	Dropbox, iCloud, Google Drive		OSS
	Google Chrome	browser	Internet Explorer		OSS
	Mozilla Firefox	browser	Internet Explorer		OSS
	Mozilla Thunderbird	mail client	MS Outlook		OSS
	gpg4win	PGP mail encryption	-		OSS
	Filezilla	FTP / SFTP client	-		OSS

Graphics

	program	use	replacement for	OS	license
	Inkscape	vector drawing	Corel Draw etc.		OSS
	Gimp	photo editor	Photoshop, PhotoPaint etc.		OSS
	XnView	image viewer, converter	-		Freeware
	IrfanView	image viewer, converter	-		Freeware

Multimedia

	program	use	replacement for	OS	license
	VLC Media Player	media player	Windows Media Player etc.		OSS
	Avidemux	simple video editor	-		OSS
	TV Browser	TV guide	-		OSS
	EasyTAG	media file tagging	-		OSS

Freie Betriebssysteme für den Desktop-Einsatz

	Ubuntu
	OpenSUSE