What are some alternatives?
When comparing DBeaver and SQuirreL SQL, you can also consider the following products
DataGrip - Tool for SQL and databases
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.
HeidiSQL - HeidiSQL is a powerful and easy client for MySQL, MariaDB, Microsoft SQL Server and PostgreSQL. Open source and entirely free to use.
Sequel Pro - MySQL database management for Mac OS X
Navicat - Powerful database management & design tool for Win, Mac & Linux. With intuitive GUI, user manages MySQL, MariaDB, SQL Server, SQLite, Oracle & PostgreSQL DB easily.
phpMyAdmin - phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.