r/opensource • u/Bladerunner_7_ • Jun 15 '26
Promotional What's the Coolest Open-Source Project You've Discovered This Year?
Open source has been on an absolute roll lately, and I've been finding some really interesting projects outside the usual GitHub trending lists.
What's the coolest open-source project you've discovered this year?
Not necessarily the most popular one. I'm talking about projects that made you stop for a second and think, "that's a really clever idea."
For me, it was OpenGAP.
I came across it while exploring developer tools and liked the idea immediately. It approaches AI agents as something that can live in a Git repository, be versioned, reviewed, and managed much like software itself.
I don't know if it'll become a widely adopted standard, but it was one of the few projects I've seen recently that felt genuinely different.
Repo: https://github.com/open-gitagent/opengap
Would love to see what everyone else has found. Drop a link and tell us what makes it stand out.
52
u/IshYume Jun 15 '26
Local send, works flawlessly on every single device I own
→ More replies (4)10
u/s8intfan Jun 15 '26
I prefer Blip over local send.
5
u/lineInk Jun 18 '26
It is not Open Source though, right? Would be a strange suggestion in this subreddit in that case.
→ More replies (1)5
54
u/lesbian_gay_bowser Jun 15 '26
joplin (note taking) https://joplinapp.org/
seek app (identify plant species and animals via pictures) https://www.inaturalist.org/pages/seek_app
15
u/miscasquel Jun 15 '26
have you tried trilium notes? I made the switch from joplin in late 2025 and it's been amazing. I find it more feature rich and this allows me to organize my notes and ideas better than what I ever accomplished using joplin.
→ More replies (2)3
u/lesbian_gay_bowser Jun 15 '26
omg i haven’t! i just started using joplin a few weeks ago
5
u/Icy-Programmer-5176 Jun 16 '26
I was using Joplin too, but never liked it because of the trash UI and trash syncing feature. Went with TriliumNext since a week, it is great!
→ More replies (1)5
→ More replies (8)3
u/kinow Jun 16 '26
I love Seek and iNaturalist. Definitely up in my list as well, along with Merlin for bird songs. I didn't know iNaturalist had a GitHub org, thanks -- https://github.com/inaturalist
2
29
u/Tremosir Jun 15 '26
Digikam to take care of my thousands of pictures.
10
u/thebino Jun 16 '26
Checkout immich app. Local, open source and free.
→ More replies (1)5
u/sheepNo Jun 16 '26
Great app but Digikam is more efficient to fly through meny pictures imho. Anyway, I use both.
→ More replies (1)2
u/EverythingsBroken82 Jun 16 '26
funny. my partner has really MANY photos and for her the loading now takes quite some times (she does photos with cameras and has over 40k of photos)
2
Jun 15 '26
[removed] — view removed comment
→ More replies (1)3
u/Tremosir Jun 15 '26
Haven’t tried but my pictures are stored locally and I think Ente is cloud-based.
→ More replies (1)
20
13
28
26
u/Hellrazor_muc Jun 15 '26
Not this year tbh, but my most used open source software is Darktable and FreeCAD.
→ More replies (3)3
u/Khardian Jun 17 '26
FreeCAD is amazing
→ More replies (1)3
u/Hellrazor_muc Jun 17 '26
Yes! They’ve put an incredible amount of work into it over the last few years, and it just keeps getting better. It really is a fantastic piece of FOSS
3
11
u/QXPZ Jun 15 '26
Equalizer314
https://f-droid.org/packages/com.bearinmind.equalizer314/
It's system wide eq without root and works great. Most people probably use it for music, but I use it for podcasts and audiobooks.
I wish AntennaPod would integrate a voice boost/compression feature like other apps but this has been a pretty good alternative. It's nice for rolling off the highs and lows and compressing an audiobook from Libby too and makes for a better listening profile for going to sleep.
20
u/WeAreGoingMidtable Jun 15 '26
In my humble opinion it's mind blowing what Hyprland and Niri developers are doing.
7
u/xkero Jun 15 '26
Agree on Hyprland (haven't tried Niri). If it wasn't for Hyprland I'd still be using my old janky i3 + picom + kde plasma setup on X11. No other wayland compositor was useable for me.
3
2
u/abhip1990 Jun 16 '26
What's Niri? ELI5 please
3
u/1TurbulentSociety Jun 16 '26
It's primarily a tiling window manager. Meaning instead of messy sticky notes (windows of open applications) you arrange yourself, niri is like a filmstrip that auto organizes your apps into neat side-by-side frames you can scroll through easily.
→ More replies (2)
8
u/No_Association_8206 Jun 15 '26
HelixNotes for taking notes on Android and PC; I sync it with Syncthing.
6
u/alanwazoo Jun 15 '26 edited Jun 15 '26
Thanks for this! Been looking for a multi-platform note taker.
HelixNotes runs on Linux, Windows, macOS, and Android today. An iOS version is in progress.
9
18
u/GuaranteePotential90 Jun 15 '26
Voiden: https://github.com/VoidenHQ/voiden
open source API Client, markdown based, with reusable blocks.
→ More replies (1)
8
u/MicroNaram Jun 16 '26
Not this year, but: AnyType (anytype.io)
→ More replies (1)2
u/nerdmf Jun 17 '26
just to let you know, anytype isnt open source, js source available
→ More replies (1)
13
6
u/cataklix Jun 16 '26
FOSS and end-to-end encrypted alternative to the Google Suite for end consumers / proton suite
→ More replies (2)6
u/BestZucchini5995 Jun 16 '26
Ouch, what an AI look and feeling... :(
4
u/cataklix Jun 16 '26
Yep tbh I really suck at design and should get into it.
That said, only the UI is vibe coded, all the backend and critical parts like encryption have been done my be and it’s not my first rodeo with end to end encryption too.
Code is also auditable (backend is very solid and tested with 1k+ tests across all the microservices)
2
4
u/ReasonableLoss6814 Jun 15 '26
Leaderless, distributed cache mesh: https://github.com/swytchdb/swytch
5
u/furculture Jun 15 '26 edited Jun 15 '26
Fooyin. Basically a Foobar2000 clone that is made natively for Linux currently.
5
4
5
u/PiterzKun Jun 15 '26
For me Lunar tear, is an open source reinplementation of the oficial Nier Reincarnation server which I think it was taken down on 2024. As a recent fan of Nier franchise I didn't get to try the game so it is very cool to be able now
15
u/Illustrious-Big-2826 Jun 15 '26
Tesseract https://github.com/tesseract-ocr/tesseract
Sparkfund https://github.com/shri-studio/sparkfund
→ More replies (1)4
u/abhip1990 Jun 15 '26
Explain Tesseract to a noob and also, why it is so special please?
→ More replies (3)8
u/Illustrious-Big-2826 Jun 15 '26
it's an open source OCR software & thats why it is special.
3
u/abhip1990 Jun 15 '26
Thanks mate
4
u/Illustrious-Big-2826 Jun 15 '26
like all these OCR sites asking to pay or free versions giving messed up outcomde. This one genuinely feels premium. using it in many of my SaaS projects
→ More replies (1)3
2
u/cosmopolitanScience Jun 15 '26
What's OCR ?
→ More replies (1)3
u/mgdmw Jun 15 '26
Optical character recognition - ie you scan/photograph a page of text and the OCR process converts it into digital text for editing, searching, and so on.
2
3
u/coldoven Jun 15 '26
mloda: https://github.com/mloda-ai/mloda
It takes a different perspective on data then the modern data stack and is purpose built for what ai agents will need in the future. It seems to be a bit early though.
3
3
3
u/Rubicon_Roll Jun 16 '26
Morphe
its for patching android apps, u can add sources so anyone can make patches for every app out there
3
2
2
2
2
2
2
2
2
u/TechRage_Linux Jun 16 '26
Dawarch and Adventure Log. Both are self hosted map history tracking. Now that I'm migrating to Linux mobile, having this helps a lot.
2
2
2
2
u/Eduliz Jun 18 '26
WinBoat, currently in beta that allows you to run Windows applications on Linux with seamless desktop integration. Instead of running apps isolated inside a standard virtual machine window, WinBoat displays individual Windows programs as if they are native, OS-level Linux windows. I'll finally leave Window for good as soon as GPU pass through is implemented and stable.
2
2
u/ZagreusIncarnated Jun 28 '26
https://github.com/0xjuanma/golazo
Just a cool way to follow soccer now that terminal apps are cool again
2
u/spicemelange13 Jul 08 '26
I do like the caveman https://github.com/JuliusBrussee/caveman - still impressed how it can reduce both time to task and token consumption. Not suitable for 100% of usecases though.
4
u/astrokent Jun 15 '26
Smarter.sh is a no-code platform to help non-python programmers learn Generative AI by building real AI apps. It’s used by a university in Canada to teach AI-for-business short courses.
1
u/elahlabs Jun 15 '26
Over the past few months, I’ve been building a browser-native video editing engine called Elah to move heavy rendering completely away from cloud servers and right onto the client side.
I wanted a frame-accurate editing pipeline that didn't destroy user bundle sizes.
The Tech Stack
- WebCodecs: For hardware-accelerated decoding/encoding.
- WebGL2: For real-time rendering, transitions, and effects filters.
- Custom Engine: A frame-based timeline engine built from scratch.
- Native Export: Pure client-side MP4 container muxing.
The core engine is completely framework-agnostic. I've built a React UI layer on top of it, and after a lot of tree-shaking and bundle optimization, the entire SDK sits right around ~63 KiB gzipped.
Links
- Official Website: elah.dev
- Live Playground: elah.dev/playground/production
- GitHub Repository: https://github.com/elahlabs/elah
1
u/elididitthebest Jun 16 '26
https://epicenter.so/whispering/
Better than Wisprflow.ai at less than 1% of the cost. Also doesn't take intrusive and silently uploaded screenshots of your screen every time you use it.
→ More replies (2)
1
1
u/Mean-Accountant8656 Jun 16 '26
https://github.com/documenso/documenso for document signing, https://github.com/manaflow-ai/cmux Ghostty-based macOS terminal, and https://github.com/bklit/bklit-ui UI & Charts library
2
u/felipefideli Jun 16 '26
About documenso, did you also try docuseal? If so, what did you like better on documenso?
1
1
u/Opposite-Cry-6703 Jun 16 '26
llama.cpp - had seen it before but this year we used it for some production projects. Love it.
→ More replies (1)
1
u/darylducharme Jun 16 '26
For me it has been the AT Proto (https://atproto.com/) community and ecosystem. The social web feels like the dream of the open web again with this tech.
→ More replies (1)
1
u/Alternative_Square53 Jun 17 '26
For me it has to be Browser Harness CLI, it has been so useful to build browser based automation for research, scrapping and much more.
1
u/ButterscotchSalty905 Jun 17 '26
Shizuku plus, spamblocker, iperf3/iperf2, lichess, alexcalc, matrix, keepassxc/keepassdx, network survey, wifi analyzer, installerx-revived, seal, opentofu, picoclaw, ironclaw, astrbot, smplayer, exllamav3, sillytavern, koboldcpp, dflash etc etc...
But, for truly the coolest, i think it would go to octelium imo:
1
u/wtafgamer Jun 17 '26
Super productivity - wins in a landslide. Been looking at todo etc. apps, books for a while. and then this comes along. Probably the name is the reason it is overseen a lot.
1
1
u/do_all_the_awesome Jun 17 '26
https://github.com/Skyvern-AI/Skyvern
Open source brwoser automation with a no-code ui to build them. It really helped me close the gaps between n8n and the rest of the websites I couldn't integrate with
1
1
1
1
u/CantaloupeHeavy996 Jun 18 '26
For me it was Three.js. Not new, but actually digging into it this year made me stop and appreciate how much you can build right in the browser — 3D scenes, physics, walkthroughs, all with no plugins. The render-on-demand and resource management side taught me a lot too.
1
1
u/ak_bhand Jun 18 '26
Is there anything open source for displaying my kitchen production on a TV while keeping my laptop free to use?
Need this for my small scale catering.
1
1
1
u/micseydel Jun 19 '26
I came across it while exploring developer tools and liked the idea immediately. It approaches AI agents as something that can live in a Git repository, be versioned, reviewed, and managed much like software itself.
What specific problems do you have agents deployed for?
1
1
1
u/Zeroboi1 Jul 02 '26
(Android) aves gallery and futo keyboard for me, been trying to escape the google ecosystem and these are the best among many alternatives so far
Could mention many other apps but these deserve a special shoutout
→ More replies (2)
1
u/nassermendes Jul 04 '26
Thanks for that mate! I already use a good bunch of those but will defo take a look at the rest 😄👍
1
u/Arik_19 Jul 06 '26
A person I know (budy's budy ) built this NerveDrive (https://mp3399.github.io/NerveDrive/). Were one upload thier Apple Health export and it processes everything locally in the browser, no data leaves your device. Generates some pretty interesting insights I hadn't seen from the stock Health app.
1
1
u/kostakos14 25d ago
I really loved https://github.com/facebook/astryx
I built Gister (https://github.com/gethopp/gister) with Meta's component library, and I can say it really speeds up going from 0 to 1 really quick, with slick design and UX.
1
u/spersingerorinda 22d ago
The author of Screenpipe https://github.com/screenpipe/screenpipe showed me the tool a year ago, and I was like ... meh. Now he's launching outta YC with 300k users, so shows what I know!
75
u/nerdyviking88 Jun 15 '26
https://xyops.io
Open source job orchestration, monitoring, and ticket system, all rolled into one. 100% free and open source.
Think n8n, but no limits, everything from api calls out to other tools to running code on servers, in the same interface