Solutions, better

eclipse ide workspace customization opensource software If you need some custom filters, here’s the solution:
Locate eclipse\plugins\org.eclipse.ui.ide_3.1.0.jar (you can have different version, though), there you can find file named plugin.xml.
Look for tag, then add your filters:

Use selected=”true” if you want custom resource file filter be enabled by default.
Example file for hiding most types of backup [...]

javascript ide eclipse plugin web20 web-20 ajax JSEclipse — (still) free and neat javascript editor, distributed as a plugin for Eclipse IDE.
Pros: Code outline is the best I’ve ever seen, syntax checking, support of popular javascript “Web 2.0″ libraries / frameworks like Dojo and Prototype.
Cons: Lacks source formatting and debugging (but its possible to debug [...]