Many good launchers out there. But my ideal is one that can

(1) launch multiple programs with hot key, shortcut or Quich Launch bar
icon

(2) after lauching programs, produce an icon on the systray, through
which I can close all or some of the previously lauched programs,
and other extra programs.

(3) after closing programs, automaically unload itsself, including the
systray icon

The axiom: one click to launch, another to clean up