Vitalnix is a suite consisting of a library providing unified methods to access different user databases (Shadow, LDAP, etc), tools for user/group management, and a program for managing users in batch, suitable for large systems.
License
GNU Library or Lesser General Public License version 2.0 (LGPLv2)Follow Vitalnix User Management Suite
Other Useful Business Software
Fully Managed MySQL, PostgreSQL, and SQL Server
Cloud SQL handles your database ops end to end, so you can focus on your app.