The best replacement for sites is sights.

The best alternatives to sites are rated as following:
★★★★★  sights
★★★  cites
★★  sharepoint
★★  wordpress
★★  thornhill
★  blogger
★  visits
★  pages sharepoint 2010
★  websites
★  pages sharepoint
★  siteforce
★  apps
★  b2c sites
★  buildings
  wix
  weebly
  local intranet
  webcenter portal
  bad web sites
  free
  cities
  portals
  paid
  site collections
  cold sites
  pages
  see the sights
  google apps
  wiki
  html sites
  b2b sites
  blogs
  web pages
  word press

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

Other search terms related to sites and their ratings are:
★★★★★ registration
You have in mind a companion for sites and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of sites in all years. Click on graph for more.
sites
sights
cites