The Aligner Plugin is a tiny plugin which moves the cursor in the current editor to the right until it is aligned with the next word of the line above. If this is not possible, it moves it as far to the right as the line above and proceeds until it is aligned with the beginning of a word two lines above the current line etc. If none of that is possible, the plugin does nothing.
The plugin action is (by default) invoked by pressing Shift+Space.
Examples ("|" denotes cursor position):
For most of the Java editing done in IDEA, there is really no need for this plugin. However, for aligning things in custom format files as well as for example, for aligning Javadoc comments as in
it is quite useful.