DBeaver - DBeaver - Universal Database Manager and SQL Client.
FriendlyData - Communicate with databases like a human
SQuirreL SQL - SQuirreL SQL is an open-source Java SQL Client program for any JDBC compliant database
DataGrip - Tool for SQL and databases
DBComparer - Free Compare database tool - DBComparer 3.0 is a professional compare database tool for comparing Microsoft SQL Server 2008 (and 2005) database structure.
iotlist - Discover the internet of things