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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[–] Zerush@lemmy.ml 1 points 2 hours ago* (last edited 2 hours ago)
[–] lemmy_ng@lemmy.ml 14 points 1 day ago

alternativeto.net is great for finding these

[–] Limonene@lemmy.world 3 points 1 day ago

sgt-puzzles. Simon Tatham's Portable Puzzle collection.

Contains a bunch of simple puzzles, of the minesweeper and sudoku style. Loopy is my favorite.

Available for Linux, Windows, MacOS, Android, and anything with a web browser and a mouse. Packaged in Debian and F-droid, and probably many other places.

I like it for time wasting in lines at the DMV, for a low-stakes game when anxious, and for falling asleep.

[–] BorgDrone@feddit.nl 8 points 1 day ago

fzf fuzzy finder. Great tool to quickly find those files you were looking for.

[–] KarnaSubarna@lemmy.ml 10 points 1 day ago

NextCloud - Self hosted personal cloud solution that you can run on Docker or bare metal.

https://nextcloud.com/

[–] Artisian@lemmy.world 10 points 1 day ago (2 children)

Librera (android pdf+ reader).

I spend a lot of time reading pdfs on my phone, this has done an excellent job. Well featured, responsive, and seems respectful of the battery.

Ads or payment if you buy from the playstore, but free on F-droid and source code is here.

[–] Dreaming_Novaling@lemmy.zip 2 points 9 hours ago

+1 to Librera, I read downloaded fanfics on it when I'm on a long trip with no Wi-Fi. Very customizable, and can have an extremely dim dark mode.

[–] zeca@lemmy.ml 4 points 1 day ago* (last edited 1 day ago)

Its good, i started using it because it allows you to inverts the colors, so you can turn your pdfs into white text on black background.

[–] EvanescentWave@discuss.tchncs.de 37 points 2 days ago (3 children)

VLC (VideoLAN media player): play media files, DVDs, network streams and more. Just works,

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[–] hakunawazo@lemmy.world 3 points 1 day ago* (last edited 1 day ago)

Silverbullet is like Trilium or Obsidian a markdown notes app, which is lightweight and highly customizable (by css and scripting). And all files could be forever accessed as simple markdown-files in an easy folder structure without much overhead. The database is only for indexing and could be restored anytime.

[–] Core_of_Arden@lemmy.ml 37 points 2 days ago* (last edited 2 days 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...

[–] Core_of_Arden@lemmy.ml 36 points 2 days ago (6 children)

Inkscape - the best vector graphics program out there. So easy to use, and so powerful.

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[–] Core_of_Arden@lemmy.ml 32 points 2 days ago* (last edited 2 days ago)

Firefox - the original private webbrowser. Even though some people don't like the options in it (like those that let you stream Netflix and other DRM content). If people care about privacy, they use this browser, or one that is made from it...

[–] Core_of_Arden@lemmy.ml 30 points 2 days ago (1 children)

GIMP - unlike Krita - which is made for drawing - this is made for photo-editing. It's like Photoshop. The learning curve is a bit steep, but it is really powerful.

[–] Zerush@lemmy.ml 4 points 1 day ago (3 children)

Krita is certainly made for painting and also animation, but you can also edit photos with it, best to have both, GIMP and Krita, they are great complementing tools.

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[–] Core_of_Arden@lemmy.ml 30 points 2 days ago

Krita is a fantastic program for drawing. It's made for making beautiful paintings and animations.

[–] kazerniel@lemmy.world 42 points 2 days ago (1 children)

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

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Mihon Manga reader for android. Allows auto aggregation from web sources to make tracking and reading manga smooth and easy

[–] callyral@pawb.social 26 points 2 days ago* (last edited 2 days ago) (2 children)

strudel. From the website:

With Strudel, you can expressively write dynamic music pieces.

The best place to actually make music with Strudel is the Strudel REPL

It's really fun to make music in it, I recommend trying it out!

link to repo (codeberg)

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[–] TheOrionArm@lemmy.world 38 points 2 days ago

librewolf a privacy-focused fork of the latest stable firefox (win,linux,mac)

[–] Core_of_Arden@lemmy.ml 22 points 2 days ago* (last edited 2 days ago) (3 children)

Thunderbird - a brilliant e-mail program, which also handles contacts, newsfeeds, calender and more. It's available for multiple platforms, like Android, Windows, Linux and so forth...

[–] Dreaming_Novaling@lemmy.zip 2 points 9 hours ago

Just wanted to say that mobile Outlook had a stroke trying to let me login to my school account after doing a mandated password change, while Thunderbird let me login issue free. So yeah, Thunderbird is where I check my mail now (outside of my proton mail account)

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[–] kazerniel@lemmy.world 37 points 2 days ago (2 children)
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[–] exu@feditown.com 3 points 1 day ago

CoolerControl - Fan control for Linux based on any available sensors.
I find it much easier to use than fancontrol included with lm_sensors and much more reliable for me.

[–] kazerniel@lemmy.world 18 points 2 days ago

MusicBrainz Picard: superb mp3 tagger with online metadata lookup feature and audio track fingerprinting

[–] Sergio@lemmy.world 15 points 2 days ago

Vassal - an open-source (LGPL-2.1) boardgame engine. basically, people build different modules for each game they want to play, then they can play that game over the internet or solo. Mostly focused on "chit-and-hex" style wargames.

[–] PumpkinDrama@reddthat.com 210 points 3 days ago* (last edited 3 days ago) (13 children)

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

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