The best replacement for gimbal is ball head.

The best alternatives to gimbal are rated as following:
★★★★★  ball head
★★★★★  ibeacon
★★★★  estimote
★★★★  gimbal
★★★  glidecam
★★★  baffle
★★★  fluid head
★★★  gyroscope
★★  strapdown
★★  unipivot
★  servo
★  wimberley
★  zenmuse
  2 axis gimbal
  gimble
  ballhead

Your alternative for gimbal is not listed? Suggest!
Speaking about gimbal, one probably shouldn't forget about phantom.

Other search terms related to gimbal and their ratings are:
★★★★★ phantom
You have in mind a companion for gimbal and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of gimbal in all years. Click on graph for more.
gimbal
ball head
ibeacon