a.placebetween.us - Find a meeting point based on place type
Bumble - Bumble is a social network that allows you to feel empowered while you make those connections, whether you’re dating, looking for friends, or growing your professional network. One first move on Bumble could change your life.
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Tinder - Tinder is how people meet. It's like real life, but better.
Works For All - Find a central meeting place for everyone in the group
Hinge - Find people you want to date through your friends on Facebook.