The best replacement for toolbox is tool bag.

The best alternatives to toolbox are rated as following:
★★★★★  tool bag
★★★★  tool box
★★★  pegboard
★★★  titanium backup
★★★  busybox
★★★  rom manager
★★★  tonneau cover
★  lindy
★  setcpu
  toolkit

Your alternative for toolbox is not listed? Suggest!
Speaking about toolbox, one probably shouldn't forget about fuel tank.

Other search terms related to toolbox and their ratings are:
★★★★★ fuel tank
★★★ tonneau cover
★ stacks
You have in mind a companion for toolbox and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of toolbox in all years. Click on graph for more.
toolbox
tool bag
tool box