• AdoptOpenJDK - https://adoptopenjdk.net
  • Amazon – Corretto - https://aws.amazon.com/corretto
  • Azul Zulu - https://www.azul.com/downloads/zulu/
  • BellSoft Liberica - https://bell-sw.com/java.html
  • IBM - https://www.ibm.com/developerworks/java/jdk
  • jClarity - https://www.jclarity.com/adoptopenjdk-support/
  • OpenJDK Upstream - https://adoptopenjdk.net/upstream.html
  • Oracle JDK - https://www.oracle.com/technetwork/java/javase/downloads
  • Oracle OpenJDK - http://jdk.java.net
  • ojdkbuild - https://github.com/ojdkbuild/ojdkbuild
  • RedHat - https://developers.redhat.com/products/openjdk/overview
  • SapMachine - https://sap.github.io/SapMachine
----------------------------------------------------------------------------------------
|     Provider      | Free Builds | Free Binary   | Extended | Commercial | Permissive |
|                   | from Source | Distributions | Updates  | Support    | License    |
|--------------------------------------------------------------------------------------|
| AdoptOpenJDK      |    Yes      |    Yes        |   Yes    |   No       |   Yes      |
| Amazon – Corretto |    Yes      |    Yes        |   Yes    |   No       |   Yes      |
| Azul Zulu         |    No       |    Yes        |   Yes    |   Yes      |   Yes      |
| BellSoft Liberica |    No       |    Yes        |   Yes    |   Yes      |   Yes      |
| IBM               |    No       |    No         |   Yes    |   Yes      |   Yes      |
| jClarity          |    No       |    No         |   Yes    |   Yes      |   Yes      |
| OpenJDK           |    Yes      |    Yes        |   Yes    |   No       |   Yes      |
| Oracle JDK        |    No       |    Yes        |   No**   |   Yes      |   No       |
| Oracle OpenJDK    |    Yes      |    Yes        |   No     |   No       |   Yes      |
| ojdkbuild         |    Yes      |    Yes        |   No     |   No       |   Yes      |
| RedHat            |    Yes      |    Yes        |   Yes    |   Yes      |   Yes      |
| SapMachine        |    Yes      |    Yes        |   Yes    |   Yes      |   Yes      |
----------------------------------------------------------------------------------------

Free Builds from Source - the distribution source code is publicly available and one can assemble its own build

Free Binary Distributions - the distribution binaries are publicly available for download and usage

Extended Updates - aka LTS (long-term support) - Public Updates beyond the 6-month release lifecycle

Commercial Support - some providers offer extended updates and customer support to paying customers, e.g. Oracle JDK (support details)

Permissive License - the distribution license is non-protective, e.g. Apache 2.0