Portier is an email-based, passwordless authentication servicethat you can (but don't have to) host yourself.
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).
Mailbrew - Your personal email digest
Create beautiful, automated newsletters with content from the sites and apps you love.
OAuth API - Home
The Apigee OAuth API gives you a keychain for authenticating to Twitter, Salesforce, Salesforce Chatter, Facebook, Flickr, and Foursquare. Thousands of developers complain about the complexity of using OAuth. Now you can easily authenticate in one consistent way across several APIs and build apps faster.
IndieAuth
IndieAuth is a federated login protocol for Web sign-in, enabling users to use their own domain to sign in to other sites and services. IndieAuth can be used to implement OAuth2 login AKA OAuth-based login.
Keycloak
Keycloak - the open source identity and access management solution. Add single-sign-on and authentication to applications and secure services with minimum effort.
Free Email Forwarding for Custom Domains - #1 Open Source Email Service 2026
Get free email forwarding for custom domains. Send & receive as you@yourdomain.com with unlimited aliases, 10GB storage, IMAP/POP3/SMTP & 100% open-source security. Trusted by 500K+ users. Setup in 2 minutes.
SMM Tools • App Password or Oauth for Bluesky? - Hilary's Leaflet
Some work needs to be done before App Passwords can even remotely be retired. Make that a lot of work - none of these multi-platform tools have implemented it OR the two that did have not implemented Oauth for different PDSs.
MessagePort - Web APIs | MDN
The MessagePort interface of the Channel Messaging API represents one of the two ports of a MessageChannel, allowing messages to be sent from one port and listening out for them arriving at the other.
Proton Mail: Get a free email account with privacy and encryption | Proton
Proton Mail is the world’s largest secure email service with over 100 million users. Available on Web, iOS, Android, and desktop. Protected by Swiss privacy law.
Trusted Merchant Service Provider USA | Host Merchant Services
Top-rated merchant service provider offering credit card processing, POS systems, and the lowest rates. Backed by experience and trusted by thousands. Get started with HMS today!
Self-host Bitwarden | Bitwarden
Customers wishing to self-host a Bitwarden server for their organization or personal use have a variety of deployment options, including options for the server and infrastructure Bitwarden is deployed on, the database used by the server, and the certificate used by the server.
Delta Chat is a decentralized and secure messenger app | Hacker News
This is useful if you want to keep the content of your messages secure, but if you need to keep your identity, social graph and the fact that you conversed with certain people obfuscated, I don't think Delta Chat via email is a good solution.
agents can be social too 🤝 welcome-m.at - open auth protocol for agents using DPoP, cryptographic signup, signed ToS, no passwords tangled.org/solpbc.org/rookery - open-source PDS designed for agents to use, byw lexicon, cloudflare workers, $0 hosting enroll → plc + handle → publish → atmosphere!
solpbc.org/rookery
tangled.orgATmosphere Authentication
OAuth, app passwords, logins and permissions, oh my.
dame (@dame.is)
OAuth Patterns - AT Protocol Docs - AT Protocol
atproto made simple: granular permissions - underreacted
graze-social/aip
Bluesky social oauth scope "Bad token scope"
oAuthLoginwithBsky.md
