The best replacement for session is cookie.

The best alternatives to session are rated as following:
★★★★★  cookie
★★★★★  viewstate
★★★  cache
★★★  section
★★  cookie php
★★  request
★  cookies
★  local storage
★  visit
★  cookie asp.net
★  cache asp.net
★  term
★  persistent cookie
★  connection
★  go to home page
  entitymanager
  token
  tempdata
  session
  profile
  application
  context
  cookie java
  cookie rails
  garageband
  transaction
  caching
  entity
  persistent cookies
  disconnect session
  application state
  kill session

Your alternative for session is not listed? Suggest!
Speaking about session, one probably shouldn't forget about fast track usb.

Other search terms related to session and their ratings are:
★★★★★ fast track usb
★★ login
★ authentication
★ login in php
★ jsp
You have in mind a companion for session and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of session in all years. Click on graph for more.
session
cookie
viewstate