Codeigniter crud is an opensource user management system with add,edit
A ready-to-use CodeIgniter skeleton with tons of new features
Authentication for Django Rest Framework
This Django User Model is customised user model
Create a centralized Authentication and Authorization token server
Provides user management for your Symfony project
Use GitHub teams to manage system user accounts and authorized_keys
Laravel Impersonate is a plugin to authenticate as your users
OSRFramework, the Open Sources Research Framework is a AGPLv3+ project
Next-gen identity server with Ory-hardened authentication