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!

(page 2) 50 comments
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[–] kazerniel@lemmy.world 14 points 3 days ago

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

[–] hard_zero1@discuss.tchncs.de 48 points 4 days ago (3 children)

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

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[–] PumpkinDrama@reddthat.com 65 points 4 days ago* (last edited 4 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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[–] Zerush@lemmy.ml 16 points 4 days ago* (last edited 4 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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[–] Kalcifer@sh.itjust.works 41 points 4 days ago* (last edited 4 days ago)

Lemmy ^[1]^

References

  1. Type: Website. Title: "Lemmy". Accessed: 2025-08-03T05:12Z. URI: https://join-lemmy.org/.
[–] callyral@pawb.social 10 points 3 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.

[–] brisk@aussie.zone 55 points 4 days 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 53 points 4 days ago (3 children)

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

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[–] osugi_sakae@midwest.social 11 points 3 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.

[–] PumpkinDrama@reddthat.com 54 points 4 days ago* (last edited 4 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 4 days 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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[–] teuniac_@lemmy.world 14 points 4 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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[–] darkreader2636@lemmy.zip 41 points 4 days ago (3 children)

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

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[–] unphazed@lemmy.world 8 points 3 days ago (1 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.

[–] kazerniel@lemmy.world 2 points 2 days ago (1 children)
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[–] horseloaf@sh.itjust.works 36 points 4 days ago (5 children)

Tenacity - a pre-enshitification fork of Audacity. An audio recorder and editor that does multi-track recording, effects and much more in a really simple UI.

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[–] dogs0n@sh.itjust.works 11 points 3 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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[–] PumpkinDrama@reddthat.com 42 points 4 days ago* (last edited 4 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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[–] gon@lemmy.dbzer0.com 42 points 4 days ago (1 children)
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[–] commie@lemmy.dbzer0.com 41 points 4 days 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 43 points 4 days ago* (last edited 4 days 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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[–] Zerush@lemmy.ml 12 points 4 days ago* (last edited 4 days ago) (2 children)

ShareX, one of the best Screensho/cast productivity tool, edt tools, OCR, QR codes, scrolling capture, color picker......, storing locally, uploading captures to hosts, sharelink in clipboard. Complement with right click extension for Firefox and Chromium

Sadly Windows only

https://getsharex.com/

https://github.com/ShareX/ShareX

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[–] Deckname@discuss.tchncs.de 12 points 4 days ago

PairDrop like Localsend or Airdrop but working on anything that has an internet connection and a resonably new web Browser! You can share files even when on different networks, by pairing devices. Works like a charm.

[–] kazerniel@lemmy.world 9 points 3 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.)

[–] pseudo@jlai.lu 19 points 4 days ago (2 children)

Bookwyrm, a book tracker and review sharing plateform that is part of the fediverse allowing you to share your notes and review about books in the threadiverse as well as the twittoverse.

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[–] exu@feditown.com 3 points 3 days 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.

[–] PumpkinDrama@reddthat.com 36 points 4 days ago* (last edited 4 days ago)

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

[–] taaz@biglemmowski.win 34 points 4 days ago* (last edited 4 days ago)

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

[–] Zerush@lemmy.ml 20 points 4 days ago (2 children)

Portmaster, nowadays mandatory, monitor the traffic of all installed apps and even from the OS itself, blocking with a simple click all unwanted traffic, Inbuild DNS crypt with dynamic filterlists (customizable) blocking ads, trackers and unwanted crap from big companies. Optional SPN service (paid). Windows and Linux.

https://safing.io/

https://github.com/safing/portmaster

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[–] machiavellian@lemmy.ml 11 points 4 days ago

tomb: Tomb is a minimalistic CLI based hidden file encryption tool based on Linux dm-crypt and LUKS.
In addition to its cool ass name, it also has a GUI that's called Mausoleum.

[–] kazerniel@lemmy.world 8 points 3 days ago

GEDKeeper: genealogy software with many functions

(disclaimer: I contributed to this project :) )

[–] kazerniel@lemmy.world 8 points 3 days ago

freac: free audio converter :)

[–] PumpkinDrama@reddthat.com 33 points 4 days ago* (last edited 4 days ago) (5 children)

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

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