Google Voice - Google Voice gives you one number for all your phones, voicemail organized in an email format, free...
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
TextMe - TextMe is a free calls and messaging application at both local and international levels.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Talkatone - Android App on. Google Play. Stop paying for cell minutes, texts & landlines; Turn your iPad or iPod touch into a phone; Call/Text even in areas with bad cell coverage; Call/Text when travelling without paying for expensive international minutes.
Codeship - Codeship is a fast and secure hosted Continuous Delivery platform that scales with your needs.