Sequel Pro - MySQL database management for Mac OS X
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Slick - A jquery plugin for creating slideshows and carousels into your webpage.
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
DBeaver - DBeaver - Universal Database Manager and SQL Client.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services