CentOS vs FreeIPA: What are the differences?
CentOS: The Community ENTerprise Operating System. The CentOS Project is a community-driven free software effort focused on delivering a robust open source ecosystem. For users, we offer a consistent manageable platform that suits a wide variety of deployments. For open source communities, we offer a solid, predictable base to build upon, along with extensive resources to build, test, release, and maintain their code; FreeIPA: Manage Linux users and client hosts in your realm from one central location with CLI, Web UI or RPC access. 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.
CentOS and FreeIPA can be primarily classified as "Operating Systems" tools.
FreeIPA is an open source tool with 317 GitHub stars and 186 GitHub forks. Here's a link to FreeIPA's open source repository on GitHub.