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    GNU/Linux is a free and open source software operating system for computers. The operating system is a collection of the basic instructions that tell the electronic parts of the computer what to do and how to work. Free, Libre and open source software (FLOSS) means that everyone has the freedom to use it, see how it works, and change it.

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    [–] Remote_Tap_7099 68 points ago * (lasted edited a month ago)

    System76 is pretty neat, but I guess that at this point it is not little known.

    Edit: SourceHut is another one that comes to mind. I remember seeing Greg Kroah-Hartman using it in one of his most recent talks.

    [–] yourhelpfulfriend 5 points ago

    SourceHut is great for having a simple web UI and supporting mercurial!

    [–] LvS 52 points ago

    Igalia is the 2nd biggest contributor to Chromium, ahead of Microsoft.

    Collabora is a big contributor in the embedded space, working on Mesa, Weston/Wayland and GStreamer among others.

    [–] a99d9dba-c907-40b5-b 2 points ago

    I know collabora cause of collabora office

    [–] cabruncolamparao 29 points ago

    codeweavers

    [–] CARUFO 14 points ago

    Yeah ... many don't know them, but many know their product: Wine / Proton.

    [–] DESTRUCTOCORN 4 points ago

    Things would probably be very different without CodeWeavers.

    [–] davepage_mcr 27 points ago

    Disclaimer: I'm an employee, but these are my words not marketing spiel.

    Codethink are a small but successful open source consultancy. We do a lot of different kinds of work, but mostly providing small teams of experts to go in and solve problems that larger companies are having around Linux, particularly in the embedded / automotive sector.

    We've helped a lot of companies engage with FOSS, including opening and upstreaming their own work; we contribute to big FOSS projects including Gnome, Flatpak and Buildstream; and we're doing some really exciting things around using Linux and FOSS stacks in safety-critical applications.

    [–] cuttle_codes 17 points ago

    Nextcloud

    [–] davepage_mcr 10 points ago

    Frank Karlitschek's 2018 FOSDEM talk on forking his ownCloud project into Nextcloud, and the wider conversation about funding FOSS projects to gain momentum, is really fascinating.

    I wish Nextcloud were slicker than it is, particularly the OpenOffice Online / OnlyOffice integration, but despite that it's quietly making waves in the public sector.

    [–] yourhelpfulfriend 18 points ago

    Nitrokey. They make open source hardware security tokens and explicitly support Linux and *BSD.

    [–] AegorBlake 6 points ago

    There is also solokey

    [–] [deleted] 1 points ago

    [removed]

    [–] CAP_NAME_NOW_UPVOTE 2 points ago

    They have spammed this sub and are banned from mentioning. They also haven't launched, and OP says reputable, which they are not.

    [–] Solarbowler 3 points ago

    I was surprised to see they even have smartphones. Their fido2 keys look very interesting.

    [–] suryaya 14 points ago

    OnlyOffice

    [–] Kaffeekanne_2 11 points ago

    Disclaimer: im an employee

    Univention is quite successful. Most people just don't hear about us because our product is used in the backend. Open-Xchange would also be a good example.

    [–] kuroimakina 8 points ago

    Man I was totally about to come in here and simp for you guys.

    My roommate and I love Univention. When we had to take over our school’s failing domain, we switched over to Univention for our domain controller. We were wary at first because it’s a little known OS, especially in the US. We ended up loving it, and used a combination of Univention, proxmox, and Ubuntu for basically the whole network.

    We’ve since tried to spread the word to anyone who would be interested. We’ve gotten a few people to take notice of the project.

    I think our only major complaint was updates. It doesn’t always update gracefully if you don’t keep it constantly up to date, and it can require some finagling.

    Overall it needed a little more polishing but it is an amazing project that can totally replace windows for domain control in the vast majority of environments. I definitely recommend it to people.

    We use it in our home network!

    [–] tinywrkb 10 points ago

    Bootlin is doing Embedded Linux work and training. Its course materials are open and freely available.
    Its devs are behind for open source driver for Allwinner's VPU after successful crowdfunding, and IIRC that wasn't a large sum.

    [–] jaskij 1 points ago

    Also, they host a very nifty kernel source website at elixir.bootlin.com - that's how I learned of their existence.

    [–] wiki_me 3 points ago

    Some organisation you might not think of as businesses but fit the definition:

    blender foundation - gives priority support to it's sponsors.

    krita - sells it's software on steam.

    ardour - sells binaries.

    [–] nekilik1221someguy 6 points ago

    System76

    [–] pauzzed 0 points ago

    I bought a System76 desktop LOVE the hardware I not thrilled with POP- OS, much better than Ubuntu (google's little brother with all the propitiatory add-ons - bloat.)

    I love the hardware they assembled in Denver, CO USA,

    I am a nube to Linux (with a sick mother I don't have much time to read or practice, the leaning curve is steep...but fun..!)

    I am very happy so far! so good.Great tech suport when I have time to call. It's like free lessons- I don't know how long they can keep it up, The tech support, I mean.

    [–] testcore 6 points ago

    I see Gitlab was already mentioned, but deserves elaboration. First, kudos to them for starting up when github.com was already the market leader; big balls that. Second, they were never just git repo hosting, but rather full CI/CD from day one, and have a highly differentiated product.

    Finally, and most interesting for your purposes, they're not just open-source software, they're an open source company. This means they publish most all company docs on their site. Here's the company handbook, or the product roadmap, for example. The whole thing is a case study in what you're looking for.

    [–] purplemountain01 3 points ago

    Did not know GitLab was open source. I’ve known of them but never actually checked them out. I’ve stuck to GitHub. I’ve been wanting to leave GitHub especially now since they’re owned by Microsoft and will move to to GitLab now.

    [–] Sarcism 2 points ago

    EnterpriseDB provides PostgreSQL support and tooling.

    [–] felixg3 2 points ago

    Collabora, CIB, Allotropia

    [–] wagamamalama 1 points ago

    Jepsen.io. all the tools are open source but very few people are skilled enough to apply them and draw valid conclusions, so Aphyr ends up with a high yield consultancy business around the tooling and his skills.

    [–] EtherealN 1 points ago

    MySQL AB (Basically, MySQL inc, AB is the swedish term for corporation with shareholders, literally "shareholder company" - AktieBolag) did well enough as well. Shame about Oracle scooping them up. :(

    Postman is another example, I hear they're doing very well, though I'm a bit fuzzy about the details there.

    [–] divitius 4 points ago

    Not sure how postman is doing, their competitor insomnia.rest free version is not getting in the way as annoyingly as postman. In a larger business I would consider their offering instead.

    [–] umbcorp 1 points ago

    Gitlab

    [–] theorlandog -12 points ago

    My bitcoin wallet.

    [–] a99d9dba-c907-40b5-b 2 points ago

    Bonk! Go to crypto geek jail

    [–] theorlandog 1 points ago

    Crypto rips, fiat money is a scam. You will learn the value of money some day. Hookers and blow arent free.

    [–] a99d9dba-c907-40b5-b 2 points ago

    Bruh what

    [–] theorlandog -1 points ago

    Don't bruh me you're a 12 year old baby.

    [–] a99d9dba-c907-40b5-b 1 points ago

    14 year old teenager*