The best replacement for iss is mir.

The best alternatives to iss are rated as following:
★★★★★  mir
★★★  oss
★★★  skylab
★★★  search associates
★★★  apache
★★  tiangong
★★  optimount
★  rakks
★  swats
★  tipping point
★  nessus
★  glass lewis
★  iac
★  paddling
  icms
  snort

Your alternative for iss is not listed? Suggest!
Speaking about iss, one probably shouldn't forget about ham radio.

Other search terms related to iss and their ratings are:
★★★★★ ham radio
★★★★★ shuttle docked
★ space shuttle docked
You have in mind a companion for iss and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of iss in all years. Click on graph for more.
iss
mir
oss