The best free alternative to SQL Workbench/J is DBeaver, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to SQL Workbench/J and many of them is free so hopefully you can find a suitable replacement. Other interesting free alternatives to SQL Workbench/J are HeidiSQL (Free, Open Source), MySQL Workbench (Free, Open Source), phpMyAdmin (Free, Open Source) and Valentina Studio (Freemium).
ORBADA is an excellent tool for database developers, SQL developers, DBA administrators, as well as for users who wish to broaden their knowledge and skills in SQL. Using JDBC libraries, Dedicated plug-ins Oracle, SQLite, Firebird, HSQLDB, DerbyDB.
See your database in a new way. SeeQL is an easy-to-use desktop application that helps you visualize your database tables (including all foreign and primary key relationships), to quickly generate complex queries.
Open Sqlite databases and explore the internal organisation of various objects such as schema, tables and indices. To understand how Sqlite3 data is organised, please see [Database file format](https://www.sqlite.org/fileformat.html) from Sqlite website.