CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.

PopTrayU - Have you fallen in love with the fabulous email notifier program Poptray, but you're running a...

Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development

Checker Plus for Gmail - Displays new emails and the sender's contact photo, get notifications or even listen, read or...

Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.

Gmail Notifier (restartless) - is a highly customizable browser extension that notifies you about the incoming emails from all your Google-Mail accounts and labels. Gmail notifier is available for Firefox, Chrome, Opera and Safari.