Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
ManicTime - Track your computer usage and use collected data to accurately tag time.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Clockify - Simple and free time tracker. Perfect for small and mid-sized businesses as well as freelancers. Unlimited projects and users, unlimited productivity. Get all the premium functionalities, completely free.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.