We know that Windows operating system is not free, but it has become a standard for all computers in the world today. This means we also have to spend extra money to obtain an application that we can use for our works in Windows.

Fortunately there are Open Source Community movements that provide alternative software with free of charge which can be used in Windows.

LibreOffice replaces Microsoft Office

LibreOffice open source software  7 Best Open Source Program to Replace Commercial Software In Windows LibreOffice

LibreOffice was founded by former developers of OpenOffice on concerns that Oracle would turn it into a commercial product. In April this year, Oracle announced that it would discontinue the commercial development of OpenOffice and make it a pure project based on open source

[source Wikipedia]. However, LibreOffice has become alternative software for OpenOffice and Microsoft Office.

Same with the commercial version, LibreOffice comes with a word processor (Writer), a spreadsheet program (Calc), presentation tool (Impress), database management (base), and many more. And is also compatible with standard Microsoft Office file formats, but the user must remember to save or export files in the respective format.

Mozilla Thunderbird replaces Windows Live Mail

Mozilla Thunderbird  7 Best Open Source Program to Replace Commercial Software In Windows mozilla thunderbird

Mozilla Thunderbird is an application that makes it easy for users to manage desktop email client. As well as a lot of support for extension and can do a lot of tricks that cannot be done by Windows Live Mail. Unfortunately, the application cannot be used as an alternative for those who require synchronization of contact data from PCs to a mobile device.

Inkscape replaces CorelDraw and Adobe Illustrator

Inkscape open source software  7 Best Open Source Program to Replace Commercial Software In Windows Inkscape

Inkscape is a vector graphics editor that uses standard Scalable Vector Graphics (SVG) file format W3C, supports many advanced SVG features, including markers, clones, and alpha blending. Peoples rarely use it, but it will make a great tool for beginners.
Another free open source alternative for CorelDraw is a Draw from OpenOffice or Draw from LibreOffice.

GIMP replaces Adobe Photoshop

GIMP open source software  7 Best Open Source Program to Replace Commercial Software In Windows gimp

GIMP is an acronym for GNU Image Manipulation Program. GIMP is a cross-platform graphical editor, which can serve as a simple paint program, but also supports advanced features, such as photo retouching, batch processing, or image format conversion.
Another option for Windows is Paint.NET, which some people say is easier to use than GIMP, especially if you are not looking for advanced features.

Blender replaces 3ds Max

Blender open source software  7 Best Open Source Program to Replace Commercial Software In Windows Blender

Blender is a cross-platform 3D content creation suite that supports the modeling, animation, rendering, game engine, and more. In the Blender website has a comprehensive collection of tutorials and a list of films made with the program.

BRL-CAD replaces AutoCAD

BRL-CAD open source software  7 Best Open Source Program to Replace Commercial Software In Windows brl cad

BRL-CAD is a cross-platform open source software model that supports interactive geometry editing, ray-tracing for rendering and geometric analysis that has high performance, and tools for image processing systems, and more. This program has been developed continuously for approximately 20 years to make it more impressive.

Another alternative for AutoCAD is LibreCAD.

7-Zip or WinRAR replace WinZip

7 zip an open source file compression  7 Best Open Source Program to Replace Commercial Software In Windows 7 zip

7-Zip is a file compression tool / decompression which supports many file formats and also features a simple file manager.
You may also want see PeaZip file manager, who has a portable version and the full version can also be installed on the PC. It’s available for both 32 and 64-bit for Windows and Linux.

Have you used on those open source software?