JFormDesigner 5.1.1 with IntelliJ IDEA 12.x support
We've just released JFormDesigner 5.1.1, which is now compatible with IntelliJ IDEA 12 and 12.1, has been tested with NetBeans 7.3, supports Eclipse plug-in in Java 7 VM on Mac OS X (read note below), fixes minor bugs and brings some minor improvements.
Eclipse plug-in in Java 7 VM on Mac OS X
The JFormDesigner plug-in for Eclipse depends on a JRE class that embeds Swing into SWT. Unfortunately, when migrating Apple Java 6 to Oracle Mac Java 7, the class was not migrated. There is work in progress to bring it back, but currently it is only available in JDK 7u12 Developer Preview (1.7.0_12-ea) (from jdk7.java.net/download.html), but not in Java SE 7u21 (from oracle.com). See also Java Bug 7154778 and Eclipse Bug 374199.