Office

 

LibreOffice

Free and Open Source alternative to the Microsoft Office Suite. Has alternatives to Word, Powerpoint and Excel, for instance LibreOffice can open and save to Microsoft file formats, OpenDocument, and many others.
https://www.libreoffice.org/

Scribus

Printer quality publishing application. Create signs, brochures, and newsletters.
http://www.scribus.net/

 

Browsers

Firefox

Open Source alternative to Chrome, Edge, and Safari. Developed by Mozilla this browser is slightly more secure out of the box and can be made even more secure with a few tweaks. Has a number of great addons as well.
https://www.mozilla.org/firefox

 

Brave

A Chromium based browser that is built with a focus on user privacy and blocks ads and web based trackers by default.

https://www.brave.com/

 

Email

Thunderbird

Thunderbird is a mail and news reader with much of the same functionality that Outlook has. 
https://www.thunderbird.net

Audio

Audacity

The premier audio editing tool. This program allows you to record, modify and mix audio for a variety of projects. It is used to build podcasts and create full-length CDs.
http://audacity.sourceforge.net/

CDex

Rip CD Audio into WAV files. You can also compress the files using add-in programs to convert the files to mp3.
https://cdex.mu/

Images

GIMP

An open-source image editor, an alternative to Adobe Photoshop.
http://www.gimp.org/

Video

MythTV

Create a PVR so that you can record live TV and store your DVD collection for easy playback.
http://www.mythtv.org/

MPC-BE

Based on Media Player Classic and Media Player Classic - Home Cinema. MPC-BE is a lightweight, open source, no-frills video player that just works.

https://sourceforge.net/projects/mpcbe/

Plex

Plex is a software suite designed for video storage and streaming containing both a client and server. Media is hosted on a local server and can be watched on the web or via an app which is available on a number of streaming devices.

https://www.plex.tv/

Antivirus

Windows Defender

The built in Antivirus for Microsoft Windows, comes already installed and works out of the box.

https://www.microsoft.com/en-us/windows/comprehensive-security

MalwareBytes

When Windows Defender doesn't offer enough protection MalwareBytes is the perfect complement.

https://www.malwarebytes.com/

MISC

CD Burner XP Pro

Not open source, but still a great CD burner. It will burn several types of CDs and DVDs. It will also burn a CD from an ISO. 
http://www.cdburnerxp.se/

VirtualBox

Software designed for the creation and management of virtual machines. Originally developed by Sun Microsystems both were acquired by Oracle in 2010 but virtualbox has remained open source as of 2018.

https://www.virtualbox.org/

An Extended List of Open Source Free Tools for Windows

Audio Editing Tools

Business Software

CAD Software and Electronic Design Automation (EDA)

Compression/ZIP

Databases

Dictionaries

Encyclopedia

FTP Clients

Graphics

Instant Messaging

IRC Clients

Mail & News

Anti-Spam:

Media Players (audio)

Media Players (video)

Media Players (codecs)

Networking tools

Office Tools

Operating Systems

Remote Access

Sciences and Math

Mathematics:

Biology:

Geographic Information Systems:

General:

Security, Privacy, Protection...

Server Software

CVS:

DHCP:

DNS:

FTP servers:

Jabber servers:

Mail and News:

Webservers:

SSH-servers:

Other:

SCP (SecureCoPy) Clients

Text Editors

Utilities

Cookie Settings