The best replacement for bootcamp is parallels.

The best alternatives to bootcamp are rated as following:
★★★★★  parallels
★★★★  vmware
★★  crossfit
★★  parallels 9
★  vmware fusion
★  vm
★  boot camp
★  parallels 6
★  virtualbox
★  refit
  fusion 6
  parallels desktop
  turbo jam
  virtual box
  bootcamp elite
  general assembly
  crossover
  army bootcamp
  parallel

Your alternative for bootcamp is not listed? Suggest!
Speaking about bootcamp, one probably shouldn't forget about windows 7.

Other search terms related to bootcamp and their ratings are:
★★★★★ windows 7
★★★★ linux
★★★★ fusion drive
★★★ windows 8
★★ restarting
★★ macbook air
★★ xp
★ ubuntu
★ windows
★ multiple partitions
★ mac
restart
hackintosh
You have in mind a companion for bootcamp and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of bootcamp in all years. Click on graph for more.
bootcamp
parallels
vmware