I used Eclipse for a little while. The vim emulator was really solid, the best I've seen in an IDE (I think it was actually running a vim subprocess on replaying buffer edits or something). That, however, is as much as I can say for it. I never got why people like a file browser bolted onto their editor when you only use it every now and then. CtrlP style navigation is nicer anyway and it doesn't take up a chunk of your screen 24/7. It takes ages for eclipse to start, I never found a look I really enjoyed. And I guess fundamentally with IDEs, I never got the appeal of incorporating the build process to your editor. Like the strong point of Java is supposed to be that it has all this great static analysis tooling, you shouldn't be rebuilding a project every 30 seconds so it shouldn't be a significant time saver. What's left? IDK, to each their own I guess.
Aaaannyway, one of my favorite pieces of software I have installed in the standard last.fm scrobbler. I know last.fm was kind of like a early highschool thing for a lot of people but I just opened an account a year or two ago and it's fun keeping an eye on your musical habits and the reccomendation engine is pretty good as that sort of thing goes. The normal client is just an attractive little piece of software though, aesthetically and in the sense that it's just dead simple and does a few things well.