The best replacement for task manager is task killer.

The best alternatives to task manager are rated as following:
★★★★★  task killer
★★★★  performance monitor
★★★★  activity monitor
★★★  resource monitor
★★★  regedit
★★  advanced task killer
★  process explorer
★  msconfig
★  clean master
  event viewer

Your alternative for task manager is not listed? Suggest!
Speaking about task manager, one probably shouldn't forget about no tabs.

Other search terms related to task manager and their ratings are:
★★★★★ no tabs
★★★★ ctrl alt delete
★ process explorer
You have in mind a companion for task manager and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of task manager in all years. Click on graph for more.
task manager
task killer
performance monitor