Nice Launchbar action to do a Spotlight search. Why would you want to do it here rather than in Spotlight? It’s just a little easier as you can write out the query. If you haven’t looked, there are a lot of interesting Launchbar stuff upon on github.
Launchbar action for browsing your Keyboard Maestro macros. This seems really useful. I’ve not tried it out yet.
Shawn Blanc reviews Launchbar while giving a fairly exhaustive history of that style of launcher.