Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Metastream - Watch streaming media with friends
OwnTracks - Cross-platform location sharing
Watch2Gether - Watch2Gether is an app that allows multiple people to watch the same content simultaneously and interact with each other while watching.
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...
StreamParty - StreamParty is a watch communiry, that allows you to watch video streams in sync with the people you care about, on multiple services.