VBeeJava: A VB.Net to Java Translator
- VBeeJava translates VB.Net to Java and generates a complete object oriented interface for VB.Net programs. It resolves all unknowns with inferred types and signatures. [Shareware]
- http://www.beelucid.com/

C++ to Java Conversion Utility
- Claims to fully convert any C++ GUI into a pure Java dialog with Swing components. Supports Borland and Microsoft resource files. [Commercial]
- http://www.scicontrols.com/R2J.htm

Finite State Machines
- Java package which allows the specification and automatic translation of Finite State Machines. FSMs can be used to model a wide variety of processes, behaviours and interactions in arguably more suitable ways than just using Java alone. [Freeware]
- http://sakharov.net/fsm.html

JEX: Java Extension
- Redefinition of Java using XML syntax. Lets programmers extend their chosen language, simplifies compilers, IDEs, and code generators. [Open source, GPL]
- http://jex-project.sourceforge.net/

C2J
- A converter translate C-code sources into Java classes. C2J is being developed using C language. Java version of C2J can be generated using C2J itself. [Open source, GPL]
- http://www.novosoft-us.com/solutions/product_c2j.shtml

LegacyJ PERCobol
- COBOL for the Java Execution Environment. PERCobol, Bean Utility, Screen Utility, NFS Network File Server. [Commercial]
- http://www.legacyj.com/lgcyj_perc1.html

XSLTC
- A compiler from XSLT to Java bytecode. [Open Source, BSD-like]
- http://xml.apache.org/xalan-j/xsltc_usage.html

Diamond Edge Applet Designer
- A Visual Basic add-in module. Convert your VB project to Java with one button click. Free trial download. [Commercial]
- http://www.tvobjects.com/