Where can I find idltojava for Linux?

If you want to use the ORB included with >1.2 JDK an idl-to-java is included with JDK 1.3 (even for Linux), otherwise you can download it from the sun web-site.

All the major Java ORB vendors such as Inprise and IONA include the generator with their orbs.

For other "free" orbs click here.