Open communities directory

These Zulip communities are open to the public, and have opted in to be listed.


Welcome to Artificial Intelligence @ Columbia. The community gathers faculty members, researchers, scientists, postdocs, and students working on AI/ML algorithms, and its applications ranging from biology to history. | This community hopes to become a one-stop shop for all AI events/jobs/networking events happening in Columbia. | Our happy hours are on the first Monday of every month! Sign up here: | Email us at or reach us at | Our website is at :)


Welcome to the AsciiDoc community chat! | We encourage you to join to ask questions, help fellow community members, offer feedback for the developers, get involved as a contributor, or to observe and learn. By participating, you're expected to uphold our Code of Conduct. | If you wish to participate in the AsciiDoc Working Group, we encourage you to create an Eclipse account and sign the Eclipse Contributor Agreement. If you already did, please set your Eclipse Account URL on your profile.


Welcome to the Asciidoctor user and developer community chat! | This forum is for sharing technical writing and publishing experiences with Asciidoctor, an open source processor and publishing toolchain for the AsciiDoc markup language. | We encourage you to join to ask questions, help fellow community members, offer feedback for the developers, get involved as a contributor, or to observe and learn. By participating, you're expected to uphold our Code of Conduct. | If you have trouble accessing this site, please contact

Backdrop CMS

The free and open source CMS that helps you build websites for businesses and non-profits.


BECOME DEVLEOPER love computer science love technologies low level things nerd hacky geek

Bytecode Alliance

The Bytecode Alliance is an open source community dedicated to creating secure new software foundations, building on standards such as WebAssembly and WebAssembly System Interface (WASI).


This Zulip organization hosts streams for discussing any Coq related project. The public streams are continuously archived on


A place for conversations related to any projects from


DHW - DataHandwerk toolkit mssql | DHW. Handwerk statt Massenproduktion. Craft instead of mass production. MSSQL based tools for data craftsmen. Individual customization instead of assembly line.


Community for the discussion of development and support for E4S: The Extreme-scale Scientific Software Stack | The Extreme-scale Scientific Software Stack (E4S) is a community effort to provide open source software packages for developing, deploying and running scientific applications on high-performance computing (HPC) platforms. E4S provides from-source builds and containers of a broad collection of HPC software packages.


An eBPF program is "attached" to a designated code path in the kernel. When the code path is traversed, any attached eBPF programs are executed. Given its origin, eBPF is especially suited to writing network programs and it's possible to write programs that attach to a network socket to filter traffic, to classify traffic, and to run network classifier actions. It's even possible to modify the settings of an established network socket with an eBPF program.


electronic Computational Homotopy Theory research community


A community about e-graphs and related data structures. Users, researchers, and enthusiasts welcome!

FHIR Community

FHIR is a platform specification that defines a set of capabilities used across the healthcare process. * Sign in here to chat with the FHIR community. | Sign in here to chat with the FHIR community. * Before joining, please read and make sure you can follow the community expectations | Before joining, please read and make sure you can follow the community expectations


FreedroidRPG is a mature open source sci-fi isometric role playing game. | It tells the story of a world destroyed by a conflict between robots and their human masters. Play as Tux in a quest to save the world from the murderous rebel bots who know no mercy. You get to choose which path you wish to follow, and freedom of choice is everywhere in the game. | FreedroidRPG features a real time combat system with melee and ranged weapons, fairly similar to the proprietary game Diablo. There is an innovative system of programs that can be run in order to take control of enemy robots, alter their behavior, or improve one's characteristics. An advanced dialog system provides story background and immersive role playing situations.


The GiellaLT org at Zulip is a meeting place for everyone using the GiellaLT infrastructure, and also the place to meet the members of the Divvun and the Giellatekno groups at UiT. We work with language technology tools for indigenous and minority languages, especially the Sámi languages. More information at | Anyone can join. A grace period of three days to become full members is enforced to avoid bots and spamming. | We appreciate it if you present yourself in the #new members thread when joining.


Gren is a programming language that helps you write simple and correct applications.


Welcome to the GROMACS Zulip chat! | GROMACS is a free and open-source software suite for high-performance molecular dynamics and output analysis, in particular to simulate motions and interactions of biological macromolecules such as proteins & nucleic acids. | Our Zulip chat is the informal & interactive discussion board for developers where we share experiences, request help (e.g. with code review), and simply keep track of various things happening. | If you need help with usage, or simply have a user-related discussion, please use our discussion forum at - because there we try to monitor which threads have not yet received answers.


Hermes is a heterogeneous-aware, multi-tiered, dynamic, and distributed I/O buffering system that aims to significantly accelerate I/O performance. See the official site for more information. For design documents, architecture description, performance data, and individual component design, see the wiki.


The Hibernate project's open source development community.


Discussion and support for HomelabOS | Or anything self-hosted or Linux-y. Just come in and chat! :) | NOTE: Please don't message anyone directly for support unless they ask you to. Please post in the #support stream so others can help out with and learn from your issues.


Hydraulic makes tools for software developers. Our first tool is Conveyor, which makes native packages for common desktop and server operating systems.


Real-time chat for the community. All member projects are encouraged to create a stream for themselves. See also the special "Hackathons" stream.


A cool place for beginners and experts alike playing with mathematics and algorithms in the Isabelle theorem prover!

Julia Community

This is the Zulip server for the Julia programming language community. We ask anyone joining to adhere to the Julia Code of Conduct. | To learn more about Julia, check out, or just come ask us here! | You can reach out to the admins of this Zulip by sending a direct message to @zulip-admins. | If you sign up, you will be able to see all public streams/channels, there's more than just the helpdesk!


The Jupyter community is dedicated to building open tools and services that support interactive computing for data-driven exploration and collaboration. We are an open and inclusive community, and welcoming participation and collaboration from all. By participating in this space, you must agree to abide by the Jupyter Code of Conduct (

KMK Firmware

KMK: Clackety Keyboards Powered by Python.


Creates diagrams from textual descriptions! | Kroki provides a unified API with support for BlockDiag (BlockDiag, SeqDiag, ActDiag, NwDiag, PacketDiag, RackDiag), BPMN, Bytefield, C4 (with PlantUML), Ditaa, Erd, GraphViz, Mermaid, Nomnoml, PlantUML, SvgBob, UMLet, Vega, Vega-Lite, WaveDrom... and more to come!


Community chat about the Lean interactive theorem prover (


LibreCAD, a free, open source 2D CAD software. | Join this chat channel to talk to other users and the LibreCAD team. Consider the world wide community and be patient.

Lingua Franca

Lingua Franca is a coordination language for system-level design that brings intuitive concurrency and a model of time to mainstream programming languages. Join our Zulip community to keep up with the latest and interact with contributors, users, and followers of the Lingua Franca project.


Team chat for the Manyverse project.


A Javascript Framework for Building Brilliant Applications.


弊社はShopifyアプリに特化したソフトウェア開発会社です。 Shopify Experts/Shopify Partner of the Year 2021 受賞

Mobus Operandi

A mob programming community. |


MocaccinoOS is a minimal Linux meta-distribution for the 21st century! | Beyond Gentoo. | MocaccinoOS uses Luet as a package manager, which is completely static and fully based on containers. | Mocaccino Desktop is Gentoo-based (formerly Sabayon branch) suited for Desktop environments.


Mopidy is an extensible music server written in Python. | Mopidy plays music from local disk, Spotify, SoundCloud, Google Play Music, and more. You edit the playlist from any phone, tablet, or computer using a range of MPD and web clients. |


chat for napari: a multi-dimensional image viewer for python


Narayana is a transactions toolkit which provides support for applications developed using a broad range of standards-based transaction protocols (

Network Stack Tester

NeST is a python3 package that handles testbed setup, testbed configuration, collecting and visualizing data by providing a user friendly API, addressing common issues involved in conducting networking experiments. | Repository:

One Fact Foundation

Our mission is to change global healthcare and education using open source principles.


Pachno is an open source project management, issue handling and helpdesk system.


Pijul is an open source distributed version control system based on a theory of asynchronous collaboration.


A Japanese community for those who love programming language systems (e.g. compilers, interpreters, ...etc). Originally was it a Slack community:


The Roc programming language


Cryptographic algorithms written in pure Rust:

Rust Cryptography Interest Group

Our mission is to foster a robust Rust cryptography ecosystem. |


Scottish Programming Languages Seminar | A friendly Zulip space for people interested in programming languages in Scotland and their friends |


Constructing a blazing fast symbolic manipulation toolkit

Unstructured Studio

Designing learning tools and experiences to bring creativity to all

You focus core business , We resolve user system 您专注于核心业务 , 我们解决用户系统


Communication point for the Veraison Attestation Verification component open source project (


The open source procedural texturing tool for everyone | Code of Conduct

Web of Things

The community oriented topics within the umbrella of W3C Web of Things activities


This Zulip organization hosts streams for discussing any Why3 related project.


Welcome to the Wikimedia Zulip chat! | Join to interact with students and mentors of Wikimedia Outreach programs through group chats and private messages. | Learn more about Wikimedia: | Outreach programs | Code of Conduct | Movement and projects

xi-editor and related projects

This is the community space for xi-editor and a fairly broad range of related projects; it's generally open to Rust open source projects that somehow work with xi. | Interaction here follows the Rust code of conduct.

වර්ඩ්ප්‍රෙස් ලංකා

වර්ඩ්ප්‍රෙස් ලංකා ප්‍රජාවට ඔබත් එක් වන්න..

Learn how Zulip can be a home for your community.