10 Best Open-Source Apps That Replace Paid Software Easily

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Best open source apps

Are you stuck in a cobweb of paid software subscriptions that drain your wallet every month? What if you could get a free alternative for each one with similar features, and sometimes even better functionality? I’ve handpicked some of the best open-source applications you can easily swap with existing paid software. They’ll easily save you hundreds of dollars every year.

Best open source apps
📷 Handpicked open source apps to replace their paid versions

Most of them are totally free, while others offer a paid upgrade with some extra features or limits. The latter category's free versions are powerful enough for most everyday users.

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Although there are thousands of free and open-source applications, I've picked the ones that are most popular and already used by millions of users for common everyday tasks. Let's get started!

1. LibreOffice

LibreOffice Writer application
📷 LibreOffice Writer word processor

LibreOffice is going to replace Microsoft Office you've already been using for ages. This free alternative too is a full-fledged office suite consisting of a word processor, a spreadsheet application, a slide presentation tool, a drawing application, and much more.

Pros

  • Can open and save .docx, .xlsx, and .pptx files.
  • Export to PDF format is supported.
  • Available for Windows, macOS, and Linux.
  • Fully supports OpenDocument (ODF) format for office files.

Cons

  • Documents with heavy macro usage or complex layouts may render slightly differently.
  • Excel files using Power Query and/or VBA macros may deviate from their intended behaviour.

Batch Conversion Through the Command-Line

It also has a command-line interface to batch convert files in one go. Here are a couple of examples:

# Convert all .docx files in the current folder to PDF files.
libreoffice --headless --convert-to pdf *.docx

# Convert a spreadsheet to a CSV file.
libreoffice --headless --convert-to csv june2026_report.xlsx

It's one of the most widely used Office suites. Do give it a try.

2. GIMP

GIMP photo editor
📷 Edit photos like a pro in GIMP

Fed up with Adobe subscriptions? GIMP replaces Adobe Photoshop, giving you an equally powerful photo editor. Over the years, it has evolved into a fully-featured photo editing application. With long-tail undo support, you can do non-destructive edits on a photo without any worries.

Pros

  • Supports channels, masks, and layers.
  • Color correction is also supported.
  • Flexible selection tools, including both fuzzy and path selections.
  • Scripting support to execute repetitive actions.
  • Rich collection of plugins.

Cons

  • AI-powered tools are missing.
  • Advanced high-end editing options are missing.

For the best experience, use its single-window mode.

3. Inkscape

Inkscape vector graphics editor
📷 Vector graphics editing made simple with Inkscape

If you're into vector graphic design, you're probably using Adobe Illustrator. Time to replace it with Inkscape. It's completely free with no subscription headaches. It's an actively maintained project with a large community of users. It uses SVG as the native format for vector files.

Pros

  • Easy-to-use interface.
  • Bitmap tracing support for raster-to-vector conversion.
  • Export to different file formats, including .eps.
  • Style and animate SVGs with CSS and JavaScript.

Cons

  • Not suitable for complex projects involving some print-industry formats.

It also has a command-line interface for exporting SVGs to different file formats.

4. Blender

Blender application
📷 Blender is a powerful 3d content creation application

Blender is a worthy replacement for 3D creation tools like Maya or Cinema 4D. It's one of my favorite applications in this list. Both 2D and 3D content can be created through it. It can also be a part of your game development workflow. From modeling to video editing, it covers it all.

Pros

  • Extremely powerful rendering engine.
  • Do procedural modeling through geometrical nodes.
  • Automate workflows through a Python API.
  • Rich plugin ecosystem.
  • Tons of free guides and tutorials.

Cons

  • It has a steep learning curve.

If you are a first-time user, make sure your computer meets the minimum system requirements to get the best experience.

5. Kdenlive

Kdenlive video editing application
📷 Kdenlive runs smoothly on mid-range computers too

If you're into video editing and want something powerful yet light enough to run smoothly on mid-range computers, Kdenlive is your best bet. It easily replaces resource hogs like Premiere Pro. Social media content creators can use it to create professional-grade videos without spending a dime.

Pros

  • Multi-track editing support.
  • Use keyframes for special effects and custom transitions.
  • Proxy previews and edits to make high-resolution videos on a low-end computer.
  • Save in different video file formats.

Cons

  • None

For a simpler editing experience, Shotcut is a good alternative.

6. OBS Studio

OBS Studio application
📷 Stream video content with ease through OBS Studio

If you live stream frequently, OBS Studio gives you enough features to do it in a professional style. Twitch and YouTube streamers use it regularly. It is highly customizable and works smoothly on mid-range computers too.

Pros

  • Create unlimited scenes and switch between them smoothly.
  • Capture from multiple sources, viz., screen, webcam, game, or a window.
  • Stream to popular social media platforms with ease.
  • A library of plugins for extra features.

Cons

  • MKV files are irrecoverable if the application crashes mid-stream. Go for MP4 files.

Feel free to experiment with the settings that give the best experience with your hardware setup.

7. Bitwarden

Bitwarden password management application
📷 Bitwarden makes it easy to manage passwords across multiple devices

Password management apps are one of the important tools one needs on every device connected to the internet. Bitwarden makes it easy to manage all your login credentials in one place. Its free plan is good enough for 99% of general users. Independently audited code ensures you are in good hands.

Pros

  • Create unlimited passwords on unlimited devices (desktops or mobiles).
  • Applications are available for both desktops and mobiles. Browser extensions are also available.
  • Generate strong passwords with a click.
  • Share login credentials in a secure manner.
  • Self-hosting is also possible for complete control over every aspect.

Cons

  • None

Advanced reports and 2FA are available in a paid plan.

8. Nextcloud

Nextcloud private cloud application
📷 Create your private cloud with Nextcloud

If your data storage needs are more than what the free tier of most cloud storage services provides, and at the same time, you're not comfortable uploading your data online, Nextcloud is the solution. It has an active community that can help you get started in no time.

Pros

  • Run a private cloud server on your own hardware.
  • Extend easily through plugins or extensions.
  • Managed hosting options are available as well.

Cons

  • Management of a large installation can be overwhelming.

Always use the two-factor authentication feature while configuring Nextcloud for an extra layer of security.

9. Penpot

Penpot UI design app
📷 Design UI and prototypes with Penpot

Penpot is a fully-featured UI/UX design and prototyping app you can easily swap with platforms like Figma. It uses open web standards to ensure your designs match closely with the actual coded elements. SVG is the preferred file format on Penpot.

Pros

  • Collaborate in real-time with your team on a large project.
  • Create shareable components of a large design.
  • Get accurate measurements of a component through inspect mode.
  • Self-hosting option is available.

Cons

  • May not have as many plugins as Figma has.

First test it with a small project before migrating your large commercial projects.

10. Joplin

Joplin app for taking notes
📷 Joplin app for taking notes

With the Joplin app installed on your computer, there’s no need to pay a monthly subscription just for taking and organizing notes. It's a feature-rich and open-source app for managing your day-to-day life through to-do lists and notes. Both Markdown and plain text are supported.

Pros

  • Available for both desktops and mobile devices.
  • Sync across devices in a secure manner.
  • Sync from popular cloud storage services, e.g., Dropbox or OneDrive.
  • Save web content through a clipper.
  • Extend and customize it with the help of plugins and themes.

Cons

  • None

If you're using Nextcloud, I'll recommend connecting the two applications.