Why we are still fond of expensive applications like Microsoft Windows, Adobe, Autodesk etc. when there are a lot of open source alternatives to replace them.Yes, there are a lot of free options in front of you, from operating systems to other tools to replace your expensive software. One of the main reason most of us choose top paid software to do our day to day chores only because of their brand names. And a majority of us still don't know the open source world, where you get tools for free with similar functionality or maybe with more features than the expensive ones. So what is open source software? : " Open source software (OSS) refers to software that is developed, tested, or improved through public collaboration and distributed with the idea that the must be shared with others, ensuring an open future collaboration." Or simple we can absolutely free full version software or freely downloadable software. Why you should choose open source alternatives? There are a lot of reasons or we can say benefits by choosing open source tools as replacements for costly software. Open source programs give you complete freedom without any shady terms and conditions.Open source software code is readily available for anyone who wants it, so anyone can use it, share it, modify it for their own needs, and study it.No spying eyes. Top paid operating systems and tools track their users.In some cases, open source tools offer features or performance benefits that surpass their commercial counterparts.Finally, cost-effective \u2014 no hidden charges, completely free. Here in this article, we are going to list some best open source software alternatives for expensive applications. Install them and find out how they can outperform your existing paid software. Most of the open source software (leave the first one, its an operating system) listed here comes with cross-platform support, that means you can install it an run in multiple platforms such as \u2014 Windows, Mac, Linux. Best open source alternatives for expensive applications: Start here \u2014 Use Linux distro instead of Windows: If your planning to download a pirated copy of Windows, then stop. Why you are compromising your security since there are thousands of free operating system available in open source world. Linux distro \u2014 a better alternative for Microsoft Windows when it comes to privacy and security. Check out some of our articles to choose the best Linux distros that suit for you. Best Linux Distro For BeginnersBest Security-Centric Linux Distributions For Privacy ProtectionBest lightweight Linux distros to powerup your old computer 1. Audacity Category: Audio Editor Audacity is a free open source digital audio editor and recording computer software application. Key features include recording audio from multiple sources, post-processing of all types of audio, including podcasts by adding effects such as normalization, trimming, and fading in and out. Best open source alternative to: Apple LogicPro ($199.99), FL Studio Producer Edition ($199) Supported OS: Windows, OS X and Linux 2. Amarok Category: Audio\/Music Tools There are many open source software for music playback and Amarok is one of them which combines music discovery features with an attractive, easy-to-use audio player. Key features include integration with multiple Web audio services, dynamic playlists, bookmarks, scripting, context view and more. Best open source alternative to: iTunes Supported OS: Windows, OS X and Linux 3. BRL-CAD Category: CAD BRL-CAD is a powerful open source cross-platform solid modeling system that includes interactive geometry editing, high-performance ray-tracing for rendering and geometric analysis, a system performance analysis benchmark suite, geometry libraries for application developers, and more than 30 years of active development. Replaces: AutoCAD ($4,195 and up) Supported OS: Windows, OS X and Linux 4. Gimp Category: Graphics\/Drawing Gimp makes it easy to edit photos and other images\u2014just like you would with Photoshop. Suitable for professionals, it includes features like layers, gradients, photo enhancement, color manipulation, digital retouching, and much more. Best open source alternative to: Photoshop ($19.99 per user per month) Supported OS: Windows, OS X and Linux 5. Inkscape Category: Graphics\/Drawing A vector drawing program, Inkscape offers professional-quality features (markers, clones, alpha blending, etc.) for graphic designers. The site now also features an open clip art gallery that you can use in your drawings. Best open source alternative to: Illustrator ($19.99 per user per month), CorelDraw($429) Supported OS: Windows, OS X and Linux 6. Dia Category: Graphics\/Drawing Dia creates diagrams\u2014for flowcharts, org charts, and more. It doesn't have as many options for artwork and styles of boxes as Visio, but it's good enough for most casual users. Best open source alternative to: Visio Professional($589.99) Supported OS: Windows, OS X and Linux 7. OpenOffice Category: Office Productivity Apache OpenOffice includes Writer (word processing), Calc (spreadsheets), Impress (presentations), Draw (graphics), Math (mathematic equations) and Base (database). It can open, edit and export to Microsoft file formats, and it features a very intuitive interface. Best open source alternative to: Microsoft Office ($71.88 per user per year and up) Supported OS: Windows, OS X and Linux 8. LibreOffice Category: Office Productivity Forked from OpenOffice, LibreOffice offers the same types of software as its predecessor with some additional features and extensions. There\u2019s a helpful chart on its website that compares it with Microsoft Office. Best open source alternative to: Microsoft Office ($71.88 per user per year and up) Supported OS: Windows, OS X and Linux 9. PDFCreator Category: PDF Tools PDFCreator creates a PDF file from any application that can print. It also includes the digital signature and encryption capabilities, but it lacks some of Acrobat's form creating capabilities. Best open source alternative to: Adobe Acrobat ($381.65) Supported OS: Windows 10. Blender Category: 3D Graphics Tools 3D animation software can be prohibitively expensive for amateurs and home users, but Blender is completely free and has been used to create full-length animated films. It boasts photorealistic rendering, fast modeling, realistic materials, fast rigging, sculpting, an animation toolset, full compositor and more. Best open source alternative to: AutoDesk Maya ($3,675) Supported OS: Windows, OS X and Linux 11. Cinelerra Category: Video Editing Tools Cinelerra \u2014 This video editor describes itself as "useful and fast" but acknowledges that it doesn't have quite as many features as modern professional tools. There's a community-based fork with very similar functionality and community support at Cinelerra.org. Best open source alternative to: Adobe Premiere Pro ($19.99 per user per month), Avid Media Composer Supported OS: Windows, OS X and Linux 12. Avidemux Category: Video Editing Tools Avidemux can handle many simple cutting, filtering and encoding tasks, but isn\u2019t as full-featured as some other video editors. It does have some automation, scripting and batch processing capabilities. Best open source alternative to: Adobe Premiere Pro ($19.99 per user per month), Avid Media Composer Supported OS: Windows, OS X and Linux 13. Bluefish Category: Web Site Creation Tools While it's not quite as user-friendly as its commercial competitors or the other open-source options listed here, Bluefish offers a very fast WYSIWYG HTML editor that doesn't use a lot of system resources. Aimed at coders more than designers, it also includes support for a number of other programming languages. Best open source alternative to: Adobe Dreamweaver ($19.99 per user per month) Supported OS: Windows, OS X and Linux 14. KeePass Category: Security Tools KeePass is a free open source password manager, which helps you to manage your passwords securely. You can put all your passwords in one database, which is locked with one master key or a key file. So you only have to remember one single master password or select the key file to unlock the whole database. The databases are encrypted using the best and most secure encryption algorithms currently known (AES and Twofish). Best open source alternative to: RoboForm, LastPass Supported OS: Windows, OS X and Linux 15. ClamWin Category: Antivirus ClamWin Free Antivirus is used by more than 600,000 users worldwide on a daily basis. It comes with an easy installer and open source code. You may download and use it absolutely free of charge. It features high detection rates for viruses and spyware; Scanning Scheduler; Automatic downloads of regularly updated Virus Database; Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer; Addin to Microsoft Outlook to remove virus-infected attachments automatically. Best open source alternative to: Kaspersky Anti-Virus, McAfee AntiVirus Plus Supported OS: Windows 16. 7-zip Category: Compression Tools While WinZip offers a fancier interface and more menu options, 7-zip lets you create 7z files with a higher compression rate, which means it creates smaller files. 7-zip also reads and writes WinZip files, as well as a number of other popular compression formats. Best open source alternative to: WinZip Supported OS: Windows, OS X and Linux 17. Psiphon Psiphon is an Open Source VPN project for Windows and Android. For me it's excellent, and surely I will prefer it over other free VPN services. Psiphon is a circumvention tool from Psiphon Inc. that utilizes VPN, SSH and HTTP Proxy technology to provide you with uncensored access to Internet content. Best open source alternative to: Popular paid VPN clients. Supported OS: Windows and Android 18. Natron Category: Compositing Software\/Video Editing Natron is a free and open-source node-based cross-platform compositing software. It offers robust and efficient tools for compositors to get their job done fast with high-quality results. Best open source alternative to: Adobe After Effects ($1,330), Avid Media Illusion ($24,800) Supported OS: Windows, OS X and Linux 19. Clonezilla Category: Backup\/Restore Tool When it comes in data backup and restoration, Clonezilla is the best open source solution for you. It allows you to backup and recovers your system should it be taken out by a virus or a hard drive crash. Best open source alternative to: Symantec Norton Ghost, Acronis True Image Supported OS: Windows and Linux 20. FreeCAD Category: CAD Like BRL-CAD, FreeCAD is a computer-aided drawing software that targets product design and mechanical engineering. Its main focus is dynamic simulation and analyzation. Best open source alternative to: AutoCAD ($4,195 and up) Supported OS: Windows, OS X and Linux 21. HandBrake Category: Video Converter HandBrake is the perfect tool for converting video from nearly any format to a selection of modern, widely supported codecs. One of the remarkable features of this tool is the conversion of video files to minimize file size without losing the picture quality. Best open source alternative to: Nero Recode 2 Supported OS: Windows, OS X and Linux 22. Quanta Plus Category: Web Development Tools Quanta Plus guarantees a quick and effortless web development environment for developers. Main features include multi-document interface, WYSIWYG editing and templates. Best open source alternative to: Adobe Dreamweaver ($19.99 per user per month) Supported OS: OS X and Linux 23. NixNote Category: Utility NixNote is a free, open-source program designed to help you take notes and stay organized. It also lets us save photos, sound files and documents. It is one of the best open source alternatives for Evernote. Best open source alternative to: Evernote, Microsoft OneNote Supported OS: Windows and Linux 24. Octave Category: Educational Tool Octave is the best open source educational tool used for numerical computation with an interactive environment. Tool features powerful mathematics-oriented syntax with built-in plotting and visualization tools and also Octave syntax is largely compatible with Matlab. Best open source alternative to: MathWorks MATLAB Supported OS: Windows, OS X and Linux 25. BleachBit Category: Clean up Tools BleachBit guards your privacy and frees disk space. It cleans the cache, clears internet history, deletes cookies and logs, shreds temporary files and gets rid of junk that you don't know is there. Best open source alternative to: CCleaner Supported OS: Windows and Linux So, that's all for now! Try this open source alternatives instead costly ones and comment your opinion regarding their features, performance etc. And also let us know other better open source alternatives for the expensive application which we forget to mention here.