







Open-source mail and collaboration server with JMAP, IMAP4, POP3, SMTP, CalDAV, CardDAV and WebDAV support. Written in Rust, designed to be secure, scalable, and easy to operate.
JSON Meta Application Protocol Specification (JMAP)
JMAP is the open protocol that replaces IMAP (and CardDAV and CalDAV). It’s faster, simpler, more powerful, and built for how email works today.

forwardemail/caldav-adapter
CalDAV server for Node.js and Koa. Modernized and maintained for @forwardemail
Self-hosting email the hard way from your own routable IPv4 block up
How we refreshed self-hosted Recoil email with our own RIPE-allocated IPv4 block, and deployed Postfix/rspamd/Dovecot to get full SPF/DKIM/DMARC deliverability.

asutherland/glodastrophe
desktop web mail client for the development of the gaia-email-libs-and-more backend
chatmail/core
Chatmail Rust Core library, used by Android/iOS/desktop chatmail apps, bindings and bots 📧
We’re Making Email More Modern With JMAP
The specifications for JMAP have been published by the Internet Engineering Task Force (IETF), marking a big victory for email tools now and in the future.

ngerakines/atproto-tools - Docker Image
A comprehensive collection of Rust components for creating AT Protocol applications. This workspace provides essential building blocks for identity management, record operations, OAuth 2.0 authentication flows, HTTP client operations, XRPC services, and real-time event streaming.
Cinny
A Matrix client where you can enjoy the conversation using simple, elegant and secure interface protected by e2ee with the power of open source.
Home - maddy
Maddy Mail Server implements all functionality required to run a e-mail server. It can send messages via SMTP (works as MTA), accept messages via SMTP (works as MX) and store messages while providing access to them via IMAP. In addition to that it implements auxiliary protocols that are mandatory to keep email reasonably secure (DKIM, SPF, DMARC, DANE, MTA-STS).
Yaak Is Now Open Source
Finally, an open-source API Client that is an alternative to Postman or Insomnia!

Scott Lanoue - CoMail
I just rewrote llama.cpp server in Rust (most of it at least), and made it scalable
497 votes, 46 comments. Long story short, I rewrote most of the llama-server, made it scalable, and bundled that into Paddler. Initially, the project…
These 20 Awesome API Clients Will Change How You Work with APIs
Postman has become a staple in API development, but it’s far from the only option. As the API...

atproto-crates — AT Protocol building blocks for Rust
A Rust workspace of eighteen crates for AT Protocol: content addressing, DID and handle resolution, repositories and Merkle Search Trees, OAuth with DPoP, XRPC services, and event streaming.
Awesome Rust Cryptography
Showcase of notable cryptography libraries developed in Rust