https://defguard.net/ - open-source SSO service built with rust on top of wireguard & OIDC. It's been a lot of work but we're slowly gaining traction and nearing the 1.0 release.
Some of the features:
* OpenID Connect based Identity Provider
* OpenLDAP synchronization - currently supporting users and groups synchronization
* MFA with TOTP, email, WebAuthn / FIDO2, crypto wallets
* wireguard client GUI integrated with OIDC, supporting multiple locations (https://defguard.net/client)
* secure enrollment & onboarding
* yubikey provisioning
Currently we're working on external OIDC providers integration.Our github: https://github.com/DefGuard
(edit: formatting, github link)
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