this post was submitted on 02 Aug 2025
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We all love open-source software, but there are so many amazing projects out there that often go unnoticed. Let's change that! Share your favorite open-source software that you think more people should know about. Here’s how you can contribute:

  1. Single Option Per Comment: Mention one open-source software per comment to be able to easily find the most popular software.
  2. No Duplicates: Avoid duplicating software that has already been mentioned to ensure a wide variety of options.
  3. Upvote What You Love: If you see a software that you also appreciate, upvote it to help others discover it more easily.

Check out last year's post for more inspiration: Last Year's Post

Let's create a comprehensive list of open-source software that everyone should know about!

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[–] toothbrush@lemmy.blahaj.zone 163 points 1 week ago* (last edited 1 week ago) (25 children)

KDE Connect: An app for iOS, android, pretty much every flavor of linux, windows, etc. that lets you connect any devices together to share files, show notifications of other devices, use your phone as an input device(keyboard, mouse), control multimedia applications(start, play, stop, etc.), trigger commands, and everything else if you make a plugin for it.

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[–] PumpkinDrama@reddthat.com 137 points 1 week ago* (last edited 1 week ago) (5 children)

KeePassXC: A modern, secure, open-source password manager that stores and manages sensitive information offline.

[–] paper_moon@lemmy.world 42 points 1 week ago (9 children)

Mixed with syncthing to sync your database file across your devices and its chef's kiss

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[–] PumpkinDrama@reddthat.com 95 points 1 week ago* (last edited 6 days ago) (3 children)

Lichess: A popular free, open-source online chess platform offering play, puzzles, and tournaments.

[–] gon@lemmy.dbzer0.com 23 points 1 week ago

IMO, this is the way to play Chess online.

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[–] PumpkinDrama@reddthat.com 95 points 1 week ago* (last edited 1 week ago) (1 children)

Forgejo: A self-hosted, lightweight software forge offering Git repository hosting with an easy-to-install, low-maintenance platform focused on collaboration, federation, and privacy.

[–] gon@lemmy.dbzer0.com 7 points 1 week ago (3 children)

I always read it as "Forge-Go," for some reason...

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[–] PumpkinDrama@reddthat.com 78 points 1 week ago* (last edited 6 days ago) (7 children)

LibRedirect is an open-source browser extension for Firefox and Microsoft Edge that automatically redirects popular online services like YouTube, Twitter, Instagram, TikTok, Reddit, and others to privacy-friendly alternative websites, enhancing user privacy by avoiding trackers and data collection on the original platforms.

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[–] BagOfHeavyStones@piefed.social 77 points 1 week ago (3 children)

Rustdesk.

It's TeamViewer / AnyDesk without the headaches.

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[–] PumpkinDrama@reddthat.com 73 points 1 week ago* (last edited 6 days ago) (2 children)

Joplin: An open-source note-taking and to-do app with markdown support and end-to-end encryption.

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[–] PumpkinDrama@reddthat.com 66 points 1 week ago* (last edited 6 days ago) (3 children)

Pandoc: A universal document converter allowing conversion among numerous markup formats including Markdown, LaTeX, HTML, and Word.

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[–] PumpkinDrama@reddthat.com 52 points 1 week ago* (last edited 6 days ago) (1 children)

Typst: A modern typesetting system designed for easy document creation with markup inspired by Markdown but more powerful and programmable.

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[–] antrosapien@lemmy.ml 49 points 1 week ago (3 children)

rnote Rnote is an open-source vector-based drawing app for sketching, handwritten notes and to annotate documents and pictures. It is targeted at students, teachers and those who own a drawing tablet and provides features like Pdf and picture import and export, an infinite canvas and an adaptive UI for big and small screens.

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[–] gon@lemmy.dbzer0.com 44 points 1 week ago (1 children)
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[–] PumpkinDrama@reddthat.com 42 points 1 week ago* (last edited 6 days ago) (6 children)

Czkawka: A free, fast, and open-source tool for finding and removing duplicate files, cleaning empty folders, and optimizing storage by content-based file comparison across multiple platforms.

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[–] PumpkinDrama@reddthat.com 42 points 1 week ago* (last edited 1 week ago) (6 children)

PieFed: a link aggregator and forum platform built for the Fediverse, focusing on individual control, safety, decentralized power, and healthy community interactions, with features like reputation indicators and keyword filters to enhance user experience.

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[–] commie@lemmy.dbzer0.com 41 points 1 week ago (4 children)

screen

a gnu until that let's you run a persistent session, even if you log off. log back in and reattach your screen and whatever you were doing is still running.

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[–] PumpkinDrama@reddthat.com 35 points 1 week ago* (last edited 6 days ago)

Xournal++: A C++ handwriting note-taking software with PDF annotation support.

[–] taaz@biglemmowski.win 35 points 1 week ago* (last edited 6 days ago)

Flameshot: screenshotting tool with everything you would ever need for screenshots

[–] PumpkinDrama@reddthat.com 31 points 1 week ago* (last edited 6 days ago) (3 children)

Nicotine+: A lightweight, free, and open-source graphical client for the Soulseek peer-to-peer file-sharing network.

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[–] PumpkinDrama@reddthat.com 30 points 1 week ago* (last edited 6 days ago) (1 children)

Helix Editor: A fast, post-modern text editor that combines modal editing and syntax awareness built in Rust for programmers.

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[–] commie@lemmy.dbzer0.com 27 points 1 week ago (2 children)

emacs, the text editor. it's so powerful and customizable that I feel listing any feature would do so many others a disservice

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[–] PumpkinDrama@reddthat.com 26 points 1 week ago* (last edited 6 days ago) (3 children)

Nuclear: A free, open-source music player that streams content from multiple free sources like YouTube, SoundCloud, and Bandcamp without ads or subscriptions.

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[–] PumpkinDrama@reddthat.com 23 points 1 week ago* (last edited 6 days ago)

Zathura: A highly customizable, minimalist, and keyboard-driven document viewer supporting PDF, PostScript, and DjVu via plugins.

[–] ambitiousslab@lemmy.ml 21 points 1 week ago (2 children)

Pass: a terminal based standard unix password manager.

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[–] commie@lemmy.dbzer0.com 20 points 1 week ago

binary eye, OR code and barcode scanner with no ads

[–] ambitiousslab@lemmy.ml 17 points 1 week ago (1 children)

Dino: a modern open-source chat client (XMPP) for the desktop.

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[–] ambitiousslab@lemmy.ml 9 points 1 week ago

eldood: lightweight tool to find dates where everyone is free.

[–] commie@lemmy.dbzer0.com 8 points 1 week ago

mednafen, the multiplatform emulator. classic gaming is so easy with mednafen's graphical interface

[–] PumpkinDrama@reddthat.com 8 points 1 week ago* (last edited 6 days ago)

Zulip: An open-source team chat platform with topic-focused threaded conversations.

[–] ambitiousslab@lemmy.ml 7 points 1 week ago

snac: a simple, minimalistic ActivityPub instance.

[–] ambitiousslab@lemmy.ml 6 points 1 week ago

Newsboat: an RSS/Atom feed reader for the text console.

[–] commie@lemmy.dbzer0.com 6 points 1 week ago (1 children)

candle, an android app that turns your display into a flashlight-like utility. very useful on tablets without an actual flashlight. I have a shortcut to it on my lock screen on my phone, and I use a red background to see when my wife is sleeping.

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[–] ambitiousslab@lemmy.ml 6 points 1 week ago (1 children)

beancount: double-entry accounting from text files.

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[–] ambitiousslab@lemmy.ml 5 points 1 week ago

Toot: a CLI and TUI tool for interacting with Mastodon instances from the command line.

[–] ambitiousslab@lemmy.ml 4 points 1 week ago

podget: a simple podcast aggregator optimized for running as a scheduled background job (i.e. cron).

[–] commie@lemmy.dbzer0.com 3 points 1 week ago

weechat, a multiprotocol chat client with many user scripts and a remote interface.

[–] ambitiousslab@lemmy.ml 3 points 1 week ago

mblaze: a set of Unix utilities for processing and interacting with mail messages which are stored in maildir folders.

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