What are some alternatives?
When comparing pgRITA and Sequel Pro, you can also consider the following products
Slick - A jquery plugin for creating slideshows and carousels into your webpage.
DBeaver - DBeaver - Universal Database Manager and SQL Client.
PostGIS - Open source spatial database
phpMyAdmin - phpMyAdmin is a tool written in PHP intended to handle the administration of MySQL over the Web.
DataGrip - Tool for SQL and databases
MySQL Workbench - MySQL Workbench is a unified visual tool for database architects, developers, and DBAs.