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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[–] LambdaRX@sh.itjust.works 76 points 3 days 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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[–] kazerniel@lemmy.world 14 points 2 days ago

and lastly, Tor Browser: anonymous web browser to evade state censorship and surveillance

[–] callyral@pawb.social 10 points 2 days ago

aria2. From the website:

aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink. aria2 can be manipulated via built-in JSON-RPC and XML-RPC interfaces.

[–] Zerush@lemmy.ml 16 points 2 days ago (2 children)

Tox is easy-to-use software that connects you with friends and family without anyone else listening in. While other big-name services require you to pay for features, Tox is completely free and comes without advertising. Chat, P2P serverless, screen/file sharing, voice, video, groups, encrypted.

https://tox.chat/

https://github.com/TokTok/c-toxcore

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[–] kazerniel@lemmy.world 14 points 2 days ago

FanControl: superb PC fan manager with custom temperature/fan speed curves and the options to combine sensors whatever way you like

[–] toothbrush@lemmy.blahaj.zone 154 points 3 days ago* (last edited 3 days ago) (22 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.

[–] Echolynx@lemmy.zip 2 points 1 day ago (2 children)

For some reason, I just can't get my Kubuntu desktop and Android phone to talk to each other with this. It does weirdly connect just fine on Arch/EndeavourOS, though.

[–] zeca@lemmy.ml 2 points 1 day ago (1 children)

Maybe kubuntu has some weird firewall default settings. When i tried using opensuse some years ago, it took me quite some time to figure out that it was its firewall that wasnt letting me use my printer and some other stuff i cant remember

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[–] unphazed@lemmy.world 8 points 2 days ago (2 children)

Learned about the mentos thing in 2006. Saw a list of things to flavor coke. This was #4 on the list and I decided to try it (yay mint coke) - at a dollar tree parking lot, in my car. Went off in my mouth and I maintained the pressure until I got the door open and my head out. Thankfully little mess on me or the car. Learned the internet can be full of sneaky assholes that day.

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[–] osugi_sakae@midwest.social 11 points 2 days ago

krename is another excellent, but not as well known as it should be, KDE app.

krename can rename files and directories, and directories recursively, to almost anything. You can rename:

  • using information from the files or about the files (image info, date / time info, etc)
  • with templates (like #### for incrementing 0001, 0002, 0003, etc)
  • by adding parts of the original file name (first three characters then the last 4 characters, for example)
  • using find and replace (spaces to underscore, remove special characters, etc), including regular expressions
  • by changing case

or with a mix of everything.

krename has a simple mode and an advanced mode for renaming, so you don't have to jump into the deep end with the features.

You do have to be careful with some of the file info functions - it will happily try to rename a movie or a pdf with (non-existent) image EXIF info, for example. That would result in a file with a name you did not intend.

[–] apprehensively_human@lemmy.ca 51 points 3 days ago (2 children)

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

[–] Echolynx@lemmy.zip 2 points 1 day ago

I gotta figure out how it works and go through the setup one of these days. I've just been using Syncthing for my photos currently.

[–] iveseenthat@reddthat.com 2 points 1 day ago

This looks awesome. I've been looking for something like this for ages

[–] Dreaming_Novaling@lemmy.zip 67 points 3 days 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.

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 131 points 3 days ago* (last edited 3 days ago) (14 children)

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

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[–] Zerush@lemmy.ml 15 points 2 days ago* (last edited 2 days ago) (3 children)

MakeHuman is a 3D character creation software designed to simplify the creation of virtual humans through a graphical user interface. The software allows users to create realistic human characters by adjusting parameters like gender, age, height, weight, and ethnicity through slider controls. Characters can be customized with clothes, hair, poses, and materials from the built-in library and exported to 3D soft, like Blender.

https://static.makehumancommunity.org/makehuman.html

https://github.com/makehumancommunity/makehuman

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[–] Voroxpete@sh.itjust.works 89 points 3 days ago (9 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.

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[–] dogs0n@sh.itjust.works 11 points 2 days ago (11 children)

GrayJay platform player. I use it for youtube only but it has many sources.

Grayjay enables you to create and watch video content in your own terms, fully retaining ownership and having control over what you watch. Your content on your terms

https://grayjay.app/

https://gitlab.futo.org/videostreaming/grayjay/

(Not to poop on NewPipe, but this app is better in my opinion, I swapped after their player was bugged for me and I got a bit annoyed on the devs response to not adding SponsorBlock (you can say no to a feature ofc, but he decided to add reasoning that was bad))

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[–] teuniac_@lemmy.world 14 points 2 days ago (1 children)

Logseq: note-taking and knowledge management application that supports Markdown and Org-mode syntax, featuring powerful linking, block-based organization, and full local data storage for privacy

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[–] PumpkinDrama@reddthat.com 65 points 3 days 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 89 points 3 days ago* (last edited 3 days ago) (3 children)

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

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[–] kazerniel@lemmy.world 9 points 2 days ago

Open Hardware Monitor: track and visualise CPU/GPU/HDD/etc. performance over time

(I've been using the original repo that I see hasn't been updated in some years, this is a more active fork.)

[–] PumpkinDrama@reddthat.com 88 points 3 days ago* (last edited 3 days 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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[–] hard_zero1@discuss.tchncs.de 57 points 3 days ago (2 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

[–] TechLich@lemmy.world 2 points 1 day ago (2 children)

I want to like this, but because there's no GTFS/public transport timetables, it makes it kinda impossible to use it to get around cities that publish their transport data.

PT is the one thing I'm still stuck on Google maps for. I REALLY want an open source alternative.

[–] Echolynx@lemmy.zip 2 points 1 day ago* (last edited 1 day ago)

Magic Earth is spotty on public transit, but it does have it, at least. And it is based on OSM. I usually just use my local transit app for accurate timetables, anyway.

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[–] PumpkinDrama@reddthat.com 75 points 3 days ago* (last edited 3 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 76 points 3 days ago (3 children)

Rustdesk.

It's TeamViewer / AnyDesk without the headaches.

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