The best replacement for spotlight is floodlight.

The best alternatives to spotlight are rated as following:
★★★★★  floodlight
★★★  quicksilver
★★★  foglight
★★★  alfred
★★  finder
★★  windows search
★★  lincraft
★  google desktop
★  launchbar
★  limelight
★  flashlight
★  windows 8 search
★  spot light
★  windows 7 search
★  flood light
★  searchlight
  halogen spotlight
  golden collection
  notification center
  casting call pro
  diagnostic manager
  foglight quest

Your alternative for spotlight is not listed? Suggest!
Speaking about spotlight, one probably shouldn't forget about matt duhamel.

Other search terms related to spotlight and their ratings are:
★★★★★ matt duhamel
★★★★ fluorescent lantern
You have in mind a companion for spotlight and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of spotlight in all years. Click on graph for more.
spotlight
floodlight
quicksilver