Are there any Java Card tool vendors?

As far as we know, the only company working on a Java Card IDE is Metrowerks. Code Warrior for Java Card is currently under development and supports source-level debug. We are currently beta-testing it and it looks promising. Metrowerks aim for an October 2001 release.

There are also a number of vendor-specific developments toolkits targeted at GSM applications. Check out their websites for more information.