- Backup and restore tool because anything is better than the SQL Server maintenance plans
- View SQL Server activity
- SQL Server Health Check
These free SQL Server tools are the one I worked with as a SQL Server Database Administrator on a daily basis. There are many, many other free tools.
Since these tools are completely free, there is no reason to not try these free SQL Server tools in your environment. It takes awhile to run and interpret what exactly the free SQL Server tools can and cannot do. But free is free. And of course, you should always have your own bag of home grown SQL Server scripts that you have developed over time.