A FAQ do MariaDB tem o seguinte tópico cobrindo exatamente essa questão, intitulada: GUI / Workbench para MariaDB Aria ? .
There are many GUI tools that work with MariaDB, such as Webyog/SQLyog, HeidiSQL, and of course, MySQL Workbench.
We know some tools have received requests and/or are working to add support for MariaDB and Aria-specific features (SQLyog, for example). Until your preferred GUI tool supports MariaDB and Aria-specific features directly, most of the tools provide a mechanism for editing and executing custom SQL code.
Um dos comentários também sugeriu essa ferramenta:
Devart dbForge Studio is a universal MySQL GUI tool. dbForge Studio for MySQL v.6.1 now works with any MariaDB database servers, and supports all MariaDB objects types. You can visually design database structures, execute SQL queries and scripts, and manage MariaDB users and their privileges.