The best replacement for office is iwork.

The best alternatives to office are rated as following:
★★★★★  iwork
★★★  libreoffice
★★★  openoffice
★★★  cubicle
★★  microsoft office
★★  office
★★  open office
★  google docs
★  office 365
★  microsoft works
★  ups
★  works
★  google apps
★  documents to go
★  iwork for mac
★  offices
★  office rt
★  libre office
  docs
  back office
  furniture
  google drive
  iwork ipad
  cube
  parks and recreation
  chrome one clue
  department
  microsoft word
  microsoft
  star office
  iworks
  iwork 09
  openoffice.org
  in the office
  ms office
  cubicles
  iwork 2013
  domestic subsidiary
  ups cheaper
  pages
  corel
  word
  top producer
  inter office
  branch
  365
  in office

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

Other search terms related to office and their ratings are:
★★★★★ outlook
★★★★ steve carell
★★★★ publisher
★★★ visio
★★ frontpage
★ avery
★ paper
★ sharepoint
★ windows 8
★ living space
warehouse
You have in mind a companion for office and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of office in all years. Click on graph for more.
office
iwork
libreoffice