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.
xCurrency - Smart Currency - A simple ads-free currency converter.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
XE.com - XE.com Inc. (XE) is a Canadian online foreign exchange services company.
Better Uptime - We call you when your website goes down
Tweetbot - Sync your timeline across your iPhone, iPad, and Mac. Mute tweets by user, hashtag, tweet source, or keywords (including regex). 3rd Party support for image, video, read later, and timeline sync services.