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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[–] pineapple@lemmy.ml 3 points 4 days ago

tag studio It's a file manager designed to use tags instead of files because tags are a much better system. It's still in alpha and I haven't actually tested it yet but I plan to use it instead of regular file managers once it becomes stable and well supported.

[–] Dreaming_Novaling@lemmy.zip 3 points 4 days ago

FMD (FindMyDevice) - An absolute necessity, especially if you aren't using Google services.

It allows you to use any device/contact you've approved to send commands to enable/disable various settings on your devices, like bluetooth, do not disturb, camera, GPS, etc. via SMS, a FMD server (self-host optional) or from notifications (i.e. use Signal to send commands). So if you've simply lost your phone in your house you could make it ring no matter what, or if it got stolen you could lock it, use GPS, or factory reset it entirely.

The dev made it after he lost a phone that didn't have Find My Device activated.

[–] sic_semper_tyrannis@lemmy.today 2 points 4 days ago* (last edited 4 days ago)

SherpaOnnx TTS for Android. There are many different voices to pick from that sound very life like and are totally worth using with GPS apps like CoMaps.

Also, just found out about Medicat recently but haven't used it yet. It looks fantastic though: Medicat is a toolkit that helps compile a selection of the latest computer diagnostic and recovery tools into an easy to use toolkit.

Ventoy is a software you put on a USB stick to make it so you can load as many bootable ISOs as you want on it at the same time and still use the leftover space for normal file storage.

[–] Zerush@lemmy.ml 0 points 6 days ago* (last edited 6 days ago)
[–] PumpkinDrama@reddthat.com 224 points 1 week ago* (last edited 1 week ago) (13 children)

Syncthing: Continuous, private, and encrypted file synchronization across multiple devices without using the cloud.

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[–] toothbrush@lemmy.blahaj.zone 165 points 1 week ago* (last edited 1 week ago) (29 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 141 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 44 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 98 points 1 week ago* (last edited 1 week ago) (4 children)

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

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[–] PumpkinDrama@reddthat.com 97 points 1 week ago* (last edited 1 week ago) (4 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.

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[–] Voroxpete@sh.itjust.works 97 points 1 week ago (10 children)

LocalSend should be called God Send because it'll save your life. It's AirDrop, but for everything and open source. Works really well, no setup, no server.

[–] pineapple@lemmy.ml 2 points 4 days ago

Local send has worked really poorly for me, and so has every program similar to it open source or not. The only network file sharing program that has always worked (mostly) floorlessly for me is AirDrop.

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[–] LambdaRX@sh.itjust.works 87 points 1 week ago (4 children)

Newpipe, an YouTube client, which is:

  • ad free

  • lightweight

  • useful, it allows downloading videos, music, and playing them when screen is locked

  • usable without account

  • multi-platform, it can also serve as client for the PeerTube, Bandcamp, SoundCloud

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[–] PumpkinDrama@reddthat.com 82 points 1 week ago* (last edited 1 week 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 79 points 1 week ago (4 children)

Rustdesk.

It's TeamViewer / AnyDesk without the headaches.

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[–] PumpkinDrama@reddthat.com 76 points 1 week ago* (last edited 1 week ago) (4 children)

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

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[–] Dreaming_Novaling@lemmy.zip 73 points 1 week ago* (last edited 4 hours ago) (9 children)

Anki (and AnkiDroid):

The gods of learning and studying with flashcards. You will never want another flashcard program, especially if you were still using Quizlet (so enshittified now...) because Anki uses SRS (spaced repetition system) which makes you review things right before your brain forgets it to reinforce the subject material.

Add-ons: Bread and butter of Anki, I use several to make beautiful automatic flashcards of reading material/videos/games when I study Japanese. There's an add-on for literally anything.

Cross platform: Free on desktop, cost $25 on iOS, and free on Android, although Ankidroid is an unofficial app. Still great though!

Cloud: Syncs your anki database across devices. If you don't use anki for a while, will delete from the cloud, but as long as you have your own local database intact, you can reupload again later. (EDIT: Went through settings, you can self-host your own sync server!)

Sharing Decks: If you don't feel like making your own decks, download ones that others shared for free.

Anki is used by language learners, college students, med students, etc. If you need to memorize it, use Anki.

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[–] PumpkinDrama@reddthat.com 71 points 1 week ago (3 children)

tmux: A terminal multiplexer that enables managing multiple terminal sessions within a single window, allowing detaching and reattaching sessions to keep programs running in the background.

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[–] PumpkinDrama@reddthat.com 69 points 1 week ago* (last edited 1 week ago) (3 children)

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

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[–] hard_zero1@discuss.tchncs.de 61 points 1 week ago (6 children)

OsmAnd, mobile app for navigation and maps. Offline, based on OSM, can do anything. I use it for checking out and bookmarking places, finding POIs and pubic transport stations, routing (especially for bike and foot), measuring distances, and so on. It can also show and record tracks, do car navigation, edit OSM points, and more stuff that I don't use. Pro/plus/full version free on FDroid

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[–] brisk@aussie.zone 58 points 1 week ago (4 children)

Zotero: a free and open-source reference management software to manage bibliographic data and related research materials, such as PDF and ePUB files.

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[–] a_person@piefed.social 56 points 1 week ago (3 children)

Shattered pixel dungeon. Open source dungeob crawler roguelike. Extremely fun.

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[–] apprehensively_human@lemmy.ca 55 points 1 week ago (3 children)

Immich is a photo/video hosting solution à la Google photos

[–] pineapple@lemmy.ml 1 points 4 days ago

Immich is the GOAT! I can't wait for it's stable release.

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[–] PumpkinDrama@reddthat.com 54 points 1 week ago* (last edited 1 week 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 52 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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[–] hard_zero1@discuss.tchncs.de 49 points 1 week ago (3 children)

FairEmail, email app for Android that has every feature I can imagine. Available on FDroid

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[–] Core_of_Arden@lemmy.ml 47 points 1 week ago* (last edited 1 week ago)

LibreOffice - simply the best office suite there is (IMHO). I was a MS-office user for years, but since I switched, I haven't looked back...

[–] kazerniel@lemmy.world 46 points 1 week ago (1 children)

qBittorrent: only for your legal torrenting needs from e.g. archive.org :>

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[–] Kalcifer@sh.itjust.works 46 points 1 week ago* (last edited 1 week ago)

Lemmy ^[1]^

References

  1. Type: Website. Title: "Lemmy". Accessed: 2025-08-03T05:12Z. URI: https://join-lemmy.org/.
[–] PumpkinDrama@reddthat.com 45 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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[–] gon@lemmy.dbzer0.com 44 points 1 week ago (1 children)
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[–] darkreader2636@lemmy.zip 43 points 1 week ago (3 children)

Copyparty turns almost any device into a file server with resumable uploads/downloads using any web browser

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