The best replacement for hangout is hang out.

The best alternatives to hangout are rated as following:
★★★★★  hang out
★★★★  skype
★★★  date
★★  google talk
★★  facetime
★  hangout on air
★  bonnaroo
★  google voice
★  chat
★  gtalk
★  tango
  google chat
  skype video quality
  gotomeeting

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

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



Google Trends

Scale is based on the average worldwide traffic of hangout in all years. Click on graph for more.
hangout
hang out
skype