Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Sequel Pro - MySQL database management for Mac OS X
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Slick - A jquery plugin for creating slideshows and carousels into your webpage.
Better Uptime - We call you when your website goes down
DBeaver - DBeaver - Universal Database Manager and SQL Client.