GoCD!

Jenkins is a fork of Hudson and is a continuous build system for software projects.

A hosted continuous integration service for open source projects. It supports Ruby, PHP, Python, Java, Node.js, and many more.

TeamCity is a continuous integration and build management system. With TeamCity, you can set up a build server within minutes and enjoy out of the box continuous unit testing, code quality analysis, and early reporting on build problems — even without leaving your favorite IDE. TeamCity offers a gentle learning curve, so you can quickly improve your release management practices by gradually adopting its advanced features and capabilities.

Octopus Deploy is a user-friendly release management system for professional .NET developers.

Automate your team’s software development processes, from testing through to delivery, no matter the language, environment or toolchain.

Automate your iOS development - From building through testing to deployment Bitrise can automate your daily development tasks.

Hudson monitors executions of repeated jobs, such as building a software project or jobs run by cron.

BuildMaster is an application release automation tool, designed by the software development team, Inedo. It combines build management and ARA capabilities to manage and automate processes primarily related to continuous integration, database change scripts, and production deployments. The tool is browser-based and able to be used “out-of-the-box”. Its feature set and scope puts it in line with the DevOps movement, and is marketed as “more than a release automation tool. It brings together the people, processes, and practices that allow teams to deliver software rapidly, reliably, and responsibly.” It’s a tool that embodies incremental DevOps adoption »

Continua CI is an affordable, scaleable Continous Integration Server. Continua CI takes minutes to install and get builds happing, with unit testing, code coverage etc. It has an intuative easy to learn web interface. Supports git, mercurial, subersion, bazaar, plasticscm, surroundscm, vault, TFS and more.

Bitten is a Python-based framework for collecting various software metrics via continuous integration. It builds on Trac to provide an integrated web-based user interface.

Automic Release Automation automates application deployments through your environments. Designed to facilitate rapid feedback and continuous delivery in agile development while providing the security, audit trails, versioning and approvals needed in production.

A continuous integration service focused on Java/JVM projects.

CruiseControl.rb is a continuous integration tool. Its basic purpose in life is to alert members of a software project when one of them checks something into source control that breaks the build.