Yes, you can use the free OpenJDK 8 with our products that use the Eclipse platform v4.5.1 (Mars 1).
These products are:
Note that Eclipse requires you to have a Java virtual machine (JVM) installed. A 64-bit Eclipse requires a 64-bit JVM, and a 32-bit Eclipse requires a 32-bit JVM. You can either install a Java Runtime Environment (JRE), or a Java Development Kit (JDK). Currently, we provide the free Oracle JRE with our products and Oracle JRE 1.8 (before the April 2019 update) remains free. For newer versions, Oracle might charge a license fee. Instead of installing the Oracle JRE, you can also use the free OpenJDK 8. For example, you can download the OpenJDK 8 (LTS) from here.
If you have installed Eclipse Mars 2 and use the VX-toolset for TriCore as a plugin (only possible for TriCore v6.3r1), you can also use versions later than OpenJDK 8.
After installing OpenJDK, ensure that it is set as your default JVM. Otherwise, you need to update the file eclipse.ini in the eclipse directory of the product to point to the correct JVM. See here for more information.
Our future products will be shipped with a free OpenJDK.