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.
Git - Git is a free and open source version control system designed to handle everything from small to very large projects with speed and efficiency. It is easy to learn and lightweight with lighting fast performance that outclasses competitors.
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Atlassian Bitbucket Server - Atlassian Bitbucket Server is a scalable collaborative Git solution.
Better Uptime - We call you when your website goes down
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.