DBeaver - DBeaver - Universal Database Manager and SQL Client.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
DataGrip - Tool for SQL and databases
Clever - syncing between education applications for K-12 schools
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Claroline - Claroline is a collaborative eLearning and eWorking platform.