Excelsior just released Excelsior JET 6.5 beta 3. With Excelsior JET, you can compile your Java- and Eclipse-based applications into a “native” executable with an embedded JRE (no external JRE required). The new version features a GUI for compiling RCP applications. Their website contains a collection of compiled open source applications, including RSSOwl, that come complete with installers. If you’re shipping an Eclipse-based application, you should take a look.