The COmputational INfrastructure for Operations Research (COIN-OR) project is an open-source community supporting development of state-of-the-art math optimization software deployed in industry and for cutting-edge computational research.

Development work on Valgrind (FreeBSD, Linux and some macOS and Solaris).

Andres is an avid Open Source software developer and co-founder of the Hackergarten initiative. He loves building software that can help solve problems around the world. He mainly contributes to Java, Groovy, Maven, Gradle, JavaFX, and Asciidoctor.

Hi, I am a [RustFest Organiser](https://rustfest.eu), maintainer of rust crates including [the ThreadPool](https://github.com/rust-threadpool/rust-threadpool/) and a Rust Contributor. Supporting me allows me to dedicate more time to the community.

We are the Tor Project, a 501(c)(3) nonprofit. We advance human rights and defend your privacy online by building and maintaining the Tor network and Tor Browser.🧅

Support Chetachi's open source work ❤️

Team leader of the rustdoc team, owner of the gtk-rs organization (providing bindings for the GNOME libraries in Rust). Trying to make the world a better by improving open source software and improving documentations to make developers' like easier.

Programmer with 20+ years of experience with a particular focus on knowledge-based systems, database, and functional programming languages. A long-time contributor for Clojure and ClojureScript and their respective ecosystems.

Support my work on ShopifySharp and other open-source projects!

I'm a game dev who previously created Dead Cells, and I'm now going full-time solo :) I maintain various public tools for the game dev community, including LEd level editor, GameBase for Haxe and various libs.

Support open source work on **mas-cli**! Install and update apps from the Mac App Store using Terminal or over an SSH connection.

Support LabStack's open source work

Loro is a CRDTs(Conflict-free Replicated Data Types) library that makes building local-first and collaborative apps easier. If you find Loro helpful, consider sponsoring its development.

Software Engineer. Help me out by sponsoring me.

Support ioquatix’s open source work

Hello, I am the creator of Dawarich, a self-hosted open-source project that allows you to track, store, and visualize your location history.

Support Yishuai's open source work

I've been working for a long time on many projects. From making websites, apps and video games to making videos designing or managing teams. Right now I spend most of my time making educational content on YouTube, and here 🙃

Support FDM Monster's work in providing a scalable 3D printing farm management platform!

Developing Themes and plugins for WordPress.

AliceVision is a friendly community gathering people from academia and industry for the development of open-source computer vision software. Our ambition is to democratize 3D digitization from photographs.

A Berlin-based software studio that builds open-source software for web developers.

Finbuckle helps build awesome .NET apps.

MushMush is a group of enthusiast working on open source honeypots since more than ten years. We are building the most popular web application and industrial honeypot.

Open source developer for KDE, specifically Plasma Mobile. Maintainer for the ProtectionStones Spigot Plugin. Open mobile ecosystem advocate. Student at University of Waterloo.