FreeIPA is described as 'integrated security information management solution combining Linux (Fedora), 389 Directory Server, MIT Kerberos, NTP, DNS, Dogtag (Certificate System). It consists of a web interface and command-line administration tools' and is an app in the Network & Admin category. There are more than 10 alternatives to FreeIPA for a variety of platforms, including Linux, Self-Hosted solutions, Windows, Mac and Online / Web-based. The best alternative is Keycloak, which is both free and Open Source. Other great apps like FreeIPA are CAS (Free, Open Source), Microsoft Active Directory (Paid), Ory (Free, Open Source) and SambaBox (Paid).
Ory builds cloud-native authentication (login), authorization (permission), delegation (OAuth2, OpenID Connect), and user management software. You can deploy what you need yourself or use the Ory Cloud Platform and get started in minutes.
SambaBox is an integrated enterprise domain appliance which works flawlessly with Windows AD environment. SambaBox offers, Integrated DNS, DHCP, CA and SaltStack with web based management on hight secure environment.
OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol. The suite includes: slapd - stand-alone LDAP daemon (server) libraries implementing the LDAP protocol, and utilities, tools, and sample clients.
Enterprise-class open source Linux LDAP server. Hardened by real-world use, full-featured, supports multi-master replication. 389 DS can be downloaded for free and set up in less than an hour using the graphical console.
Go-lang LDAP Authentication (GLAuth) is a secure, easy-to-use, LDAP server w/ configurable backends. - Centrally manage accounts across your infrastructure - Centrally manage SSH keys, Linux accounts, and passwords for cloud servers.
OpenDJ is a directory server which implements a wide range of Lightweight Directory Access Protocol and related standards, including full compliance with LDAPv3 but also support for Directory Service Markup Language (DSMLv2).