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]
url: www.scicontrols.com/R2J/R2J.html
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]
url: tech.novosoft-us.com/product_c2j.jsp
Diamond Edge Applet Designer
A Visual Basic add-in module. Convert your VB project to Java with one button click. Free trial download. [Commercial]
url: www.tvobjects.com/
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]
url: home.earthlink.net/~sakharov/fsm.html
JEX - Java Extension
A redefinition of Java using an XML syntax. This allows programmers to extend their favorite language. It also simplifies compilers, IDEs and code generators. [Open source, GPL]
url: jex.x-fs.com/
LegacyJ PERCobol
COBOL for the Java Execution Environment. PERCobol, Bean Utility, Screen Utility, NFS Network File Server. [Commercial]
url: www.legacyj.com/lgcyj_perc1.html
XSLTC
A compiler from XSLT to Java bytecode. [Open Source, BSD-like]
url: xml.apache.org/xalan-j/xsltc_usage.html