HotSpot
The Java HotSpot virtual machine.
In addition to the expected class loader, bytecode interpreter, and supporting runtime routines, you get two runtime compilers from bytecode to native instructions, 3 (or so) garbage collectors, and a set of high-performance runtime libraries for synchronization, etc.
openjdk-10 GA was the last JDK to include Hotspot as a separate repository; starting with the jdk10u update stream, Hotspot is now maintained in the src/hotspot subdir of the main openjdk project.
Current version: jdk-10+23
History