This mod of Scratch (scratch.mit.edu) will add several new features, including an extensive plugin API.
It is currently developed by the Scratch user SJRCS_011.
Jasclipse is an Eclipse plugin for developing applications written in Jasmin. It provides Jasmin editor with syntax highlighting, error marking and Ctrl+Space assistance. It also allows compiling your files with Jasmin 2.2
OpenJX is a Java XML form language similiar to Flex. In a few simple lines of XML and Javascript, a developer can create a fully featured Java application or applet. OpenJX also features a network based plugin system which is extremely powerful.