Power Search

Power Search aim to provide quick access to Applications and contacts without going to the menu or Contacts application.

While the default search app does this and more,Power Search has one advantage and that is builtin qwerty keypad i have to say is not bad.The searching also feels faster than the default app.
Searching for apps is not such a bad idea if you have a lot of apps and to get to it may be difficult.
http://store.ovi.com/content/182111