List of Java virtual machines

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This article provides non-exhaustive lists of J2SE Java virtual machines (JVMs). It does not include a large number of Java Platform, Micro Edition (J2ME) vendors. Note that J2EE runs on the standard J2SE JVM but that some vendors specialize in providing a modified JVM optimized for J2EE applications. A large amount of Java development work takes place on Windows, Solaris and Linux, primarily with the Sun JVM, which developers usually regard^{[original research?]} as capable of producing adequate quality for commercial deployment. Note the further complication of different 32-bit/64-bit varieties.

[edit] Proprietary / Closed Source implementations

Excelsior JET (with AOT compiler)
Hewlett-Packard, Java for HP-UX, OpenVMS, Tru64 and Reliant (Tandem) UNIX platforms
J9 (IBM), for AIX, Linux, MVS, OS/400, Pocket PC, z/OS
JBed, (Esmertec) is an embedded Java with multimedia capabilities
JBlend, (Aplix]) is a Java ME implementation
MRJ (Mac)
MS JVM (Microsoft)

Oracle Corporation

JRockit (orginally from BEA Systems) acquired Oracle by for Linux, Windows and Solaris
OJVM (also known as "JServer") from Oracle Corporation
PERC (Aonix) is a real time Java for embedded

[edit] Lesser-known proprietary JVMs

Sun Microsystems

Blackdown Java (Sun)
CVM (Sun), support C
Gemstone - modified for J2EE features (application DBMS)
Golden Code Development (EComStation and OS/2 port of Java RTE and SDK for J2SE v1.4.1_07)
Intent (Tao Group)
Novell, Inc.
NSIcom CrE-ME
HP ChaiVM and MicrochaiVM
MicroJvm from Industrial Software Technology (for microcontrollers 8/16/32-bit)