OptinMonster - OptinMonster helps to convert abandoning website visitors into subscribers and customers.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
Sleeknote - Set up lead capture forms on your website in minutes. No coding required. Sync your new email leads with your favorite email service provider. Try for free.
CircleCI - CircleCI gives web developers powerful Continuous Integration and Deployment with easy setup and maintenance.
Poptin - Create engaging and high converting website pop ups and contact forms in minutes. With Poptin, you get access to a feature-packed conversion rate optimization toolkit that converts more website visitors into email subscribers, leads, and customers.
Travis CI - Focus on writing code. Let Travis CI take care of running your tests and deploying your apps.