In the "IDE and Editor Integration" section of the "External Tools and Tasks" page it lists an older ant plugin for JBuilder but it doesn't list Borland JBuilder 8 Enterprise which now supports ANT natively.
Also, GEL from www.gexperts.com also supports ANT and isn't listed.
I didn't submit a bug on this 'cause I wasn't sure if this should normally come from the vendor themselves. But here are the details if anyone wants to make the update.
--------------------
Borland JBuilder Enterprise
Java IDE with support for Ant.
Compatibility: JBuilder 8 comes with Ant 1.5.1 URL: http://www.borland.com/jbuilder/index.html Contact: [EMAIL PROTECTED] License: Commercial
--------------------
GEL IDE for Windows
Java IDE with support for Ant.
Compatibility: Ant 1.4 and above URL: http://www.gexperts.com/gel.html Contact: [EMAIL PROTECTED] License: Freeware