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TeamCity is a continuous integration solution written in Java from JetBrains, the free version offers a generous amount of 100 build configurations and 3 concurrent builds.
It supports Git, Subversion, Mercurial, Perforce, Team Foundation Server, CVS, StarTeam, ClearCase, SourceGear Vault and Visual SourceSafe.
Read article Creating a New Project With TeamCity.
Read article Xamarin Android Automated CI Publishing Using MSBuild & JetBrains TeamCity.
Also watch video What's new in TeamCity 2020.2.
SpecsUpdate
Pros
Pro Cross-platform build support
The fact that it is based on Java does not hinder TeamCity's ability to support different build environments. TeamCity in fact supports a large number of languages and tools for each of those languages (build runners and test frameworks).
Some of the languages/platforms that are supported include: Ruby, .NET, Java.
Pro Supports build chains
The user can easily compose dependencies between builds by adding snapshot and artifact dependencies, all on the one screen. All output of upstream builds is available to downstream builds. Triggering sets off the entire build chain and supports re-running of the portions of the chain that failed.
Cons
Recommendations
Comments
Out of Date Pros + Cons
Con Expensive
TeamCity has a free tier which includes a maximum of 20 build configurations and up to 3 build agents. If you want to add 10 more configurations and 1 more agent, it will cost $299; unless you choose to buy an enterprise license which starts at $1999.