pmd-eclipse-plugin
PMD is a source code analyzer. It finds common programming flaws like unused variables, empty catch blocks, unnecessary object creation, and so forth. It supports Java, JavaScript...
Java Snippet Search is an Eclipse plug-in that allows you to search Java code for syntactic patterns by specifying example snippets.
Have you ever tried to debug complex programs/object structures in eclipse? Spent years or your life or resorted to making paper sketches as you debug? GraphHeap is an eclipse...