Valentina Studio is a database management app for MySQL, MariaDB, PostgreSQL, MS SQL Server, Valentina DB, and SQLite.

Here are some of its features. Note that some are only in the Pro version.

Notifications:
Valentina Server can push notifications through a notification channel which in turn can spread among subscribing applications asynchronously.

Fast Web Applications:
Build high-performance server-side web applications with PHP or Ruby on Rails.



Valentina SQLite Server:
Valentina SQLite Server is a full featured, standards compliant multi-user access SQLite based database server.

Hot Back Up Your Data:
Automatically back up your databases to any directory on your network without having to shut down your server.

Valentina Reports Server:
Server-side business applications with data-rich reports, charts, graphs, barcodes, export to PDF, HTML with all major databases and servers.

Event Scheduler:
Automate business and data management processes with Valentina Server support for triggers and event scheduling.

Valentina DB Server:
Blazingly fast object-relational database server based on the Valentina DB core model.

Auto Discover on Network:
Optionally make Valentina Server automatically and securely discoverable on your network using Bonjour, a form of zero-config.

The Pro version adds advanced data modeling tools, report design and editing, and more. Prices start at $199 for 12 months. The free version requires a key as well, limiting you to 10 minutes after each start without a trial key.