Looking for a launcher similar to Launchy, Synapse or Kupfer (with type to find and launch app feature)
Have you not considered this application which actually overlays the existing launcher, and by using gestures such as tapping on the corner of the screen, to launch a certain app. The app is called SwipePad
Its a complement to the existing launchers out there on the market.
To quote:

SwipePad is a launcher panel overlay. With a single swipe action, you
can launch anything from within any app. It's extraordinarily simple
and intuitive to use:

Touch down a pre-set edge of the screen;
Move your finger towards the center of the screen so the pad will emerge;
Release your finger on a specific slot to action.