ORY Hydra is a hardened, OpenID Certified OAuth 2.0 Server and OpenID Connect Provider optimized for low-latency, high throughput, and low resource consumption. ORY Hydra is not an identity provider (user sign up, user login, password reset flow), but connects to your existing identity provider through a login and consent app. Implementing the login and consent app in a different language is easy, and exemplary consent apps (Go, Node) and SDKs are provided.

ORY Hydra - OpenID Connect and OAuth Provider written in Go

midPoint is an Identity Provisioning system. It is a comprehensive tool that synchronizes several identity repositories and databases, manages them and makes them available in a unified form. It belongs to the Identity Provisioning category of the Enterprise Identity Management field, however midPoint itself is not limited to the enterprise. It can work equally well also for cloud services, Internet portals, telcos and service providers and so on.

midPoint - Identity Provisioning system

SSSD is a system daemon. Its primary function is to provide access to identity and authentication remote resource through a common framework that can provide caching and offline support to the system. It provides PAM and NSS modules, and in the future will D-BUS based interfaces for extended user information. It provides also a better database to store local users as well as extended user data. 

SSSD - System Security Services Daemon

Pomerium is an identity-aware proxy that enables secure access to internal applications. Pomerium provides a standardized interface to add access control to applications regardless of whether the application itself has authorization or authentication baked-in. Pomerium gateways both internal and external requests, and can be used in situations where you'd typically reach for a VPN.
 
Pomerium is a VPN alternative, it enforces dynamic access policy based on context, identity, and device state. It provides provide a single-sign-on gateway to internal applications.

Pomerium is an identity-aware proxy that enables secure access to internal applications. Pomerium provides a standardized interface to add access control to applications regardless of whether the application itself has authorization or authentication baked-in. Pomerium gateways both internal and external requests, and can be used in situations where you'd typically reach for a VPN.

Pomerium - Identity-aware access proxy

Ockam provides end-to-end encryption and mutual authentication for distributed applications. Transport layer security protocols are unable to protect application messages because their protection is constrained by the length and duration of the underlying transport connection. Ockam is a suite of programming libraries and infrastructure that makes it simple for our applications to guarantee end-to-end integrity, authenticity, and confidentiality of data.
 
It helps to create and manage cryptographic keys, unique device identifiers, and verifiable credentials in your connected environments.

Ockam provides end-to-end encryption and mutual authentication for distributed applications. Transport layer security protocols are unable to protect application messages because their protection is constrained by the length and duration of the underlying transport connection. Ockam is a suite of programming libraries and infrastructure that makes it simple for our applications to guarantee end-to-end integrity, authenticity, and confidentiality of data.

Ockam - End-to-end encryption and mutual authentication for distributed applications

FreeIPA is an integrated Identity and Authentication solution for Linux/UNIX networked environments. A FreeIPA server provides centralized authentication, authorization and account information by storing data about user, groups, hosts and other objects necessary to manage the security aspects of a network of computers. 

FreeIPA - Identity and Access Management for Linux

Apache Syncope is an Open Source system for managing digital identities in enterprise environments. Identity management (or IdM) means to manage user data on systems and applications, using the combination of business processes and IT. IdM involves considering user attributes, roles, resources and entitlements. It provides access control on Who has access to What, When, How, and Why? 

Syncope - Open Source Identity Management

ZITADEL provides you with all the features necessary to build great solutions, without the need of building the login and access management yourself. 
 
Its features include: 
<ul><li>Authentication:&nbsp; OpenID Connect 1.0 Protocol (OP), Username / Password,&nbsp; Machine-to-machine (JWT profile), Passwordless with FIDO2</li><li>Multifactor authentication with OTP, U2F</li><li>Federation with OpenID Connect 1.0 Protocol (RP), OAuth 2.0 Protocol (RP)</li><li>Authorization via Role Based Access Control (RBAC)</li><li>Identity Brokering</li><li>Delegation of roles to other organizations for self-management</li><li>Strong audit trail for all IAM resources</li><li>User interface for administration</li><li>APIs for Management, Administration, and Authentication</li><li>Policy configuration and enforcement</li><li>Private Labeling</li></ul>

ZITADEL provides you with all the features necessary to build great solutions, without the need of building the login and access management yourself. 

ZITADEL - Cloud Native Identity and Access Management

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