The best replacement for toe clips is clipless pedals.

The best alternatives to toe clips are rated as following:
★★★★★  clipless pedals
★★★★★  clipless
★★★★  straps
★★★  cleats
★★  spd
★  power grips
★  pedal straps
★  spds
★  platform pedals
★  no toe clips
  flat pedals
  toe cleats
  power grip
  bike shoes

Your alternative for toe clips is not listed? Suggest!
Speaking about toe clips, one probably shouldn't forget about pedals.

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



Google Trends

Scale is based on the average worldwide traffic of toe clips in all years. Click on graph for more.
toe clips
clipless pedals
clipless