In KDE3 times there was an awesome, simplistic launcher named Katapult. In KDE4 we have Mangonel.
I have just released version 1.1 of it, mostly just a bug fix, tweaking the prioritization. But it also has a couple of new features (configurable launch notification, config ui for autostarting).
Also, I just pushed a nice new feature for KF5, namely retrying in KIO. So if copying for some reason fails, it now asks you if you want to retry, in addition to the quasi-useless (IMHO) skip/autoskip options. But that’s coming in KF5, so not something that’s user visible in the immediate future.
But for the next release of Konsole I also recently pushed a couple of features, namely support for CTRL-clicking on URLs to open them, and also made it tell you what applications are actually running if you try to close it: