JDK builds
Basically, there is only one set of source code for the JDK. It is hosted in Mercurial at OpenJDK.
Anyone can take the source code, produce a build, and post it. So, Oracle created a certification process that should be used to ensure the build is valid. This certification is run by the Java Community Process, which provides a Technology Compatibility Kit (TCK or JCK as Java). If an organization produces an OpenJDK build that passes the TCK then that build can be described as “Java SE compatible”.
Eclipse Temurin
AdoptOpenJDK has been moved to the Eclipse Foundation and rebranded to Eclipse Adoptium project. The Adoptium OpenJDK builds are called Eclipse Temurin to distinguish the project from the builds. Eclipse Temurin builds are high-quality, vendor-neutral, and TCK-tested under a permissive license. Temurin is available for a wide range of platforms and Java SE versions.
Zulu
You can check Zulu from Azul. Azul provides open source OpenJDK builds called Azul Zulu for many operating systems and architectures. Azul Platform Core provides 100% open source, fully tested and certified, Java SE standards-compliant, well-curated builds of OpenJDK. Zulu is compliant with Java SE specifications, and has an identical level of performance to the Oracle offering, making it an easy “drop-in” replacement for Oracle HotSpot.
Amazon Corretto
You can also use Amazon Corretto. It is free to use multiplatform, production-ready distribution of the OpenJDK. It comes with long-term support that will include performance enhancements and security fixes. Check the installation instructions here.
TCK Compliant
One more thing I like to highlight here is that all the mentions builds are TCK Compliant. You can see the OpenJDK builds comparison here and here.
Check this guide to decide which jdk suits best for your needs.