What is the single best free Eclipse plugin for a Java developer
Some Eclipse plugins are mandated by your environment. The appropriate source code management plugin, for example - and I'm not interested in those.

Some provide useful enhancements, but in a specific niche. I'm not interested in those.

Some are great, but cost money. I'm not interested in those.

Some were really useful on older versions of Eclipse, but are now part of the core build of the latest Eclipee version (3.4 as I write this). I'm not interested in those.

I want advice on which plugins every Java SE developer should be installing, one per answer please.



What is the single best free Eclipse plugin for a Java developer
===

Some Eclipse plugins are mandated by your environment. The appropriate source code management plugin, for example - and I'm not interested in those.

Some provide useful enhancements, but in a specific niche. I'm not interested in those.

Some are great, but cost money. I'm not interested in those.

Some were really useful on older versions of Eclipse, but are now part of the core build of the latest Eclipee version (3.4 as I write this). I'm not interested in those.

I want advice on which plugins every Java SE developer should be installing, one per answer please.


