I've been using a patched version of JEdit with tango icons for a while, but seems like I missed the fact that 4.3 pre 14 came out with Tango support.
Go forth and download...
Via http://deadcabbit.blogspot.com/2008/05/jedit-pre14-tango-has-arrived.html
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Tango is a project to bring tasty icons to open source projects, those on windows can also see tango icons in the current version of the gimp, in linux you can see them in gnome and kde.