I like their approach to meet people. You get automatically dropped into interest groups and it's all anonymous. The barrier to meet up is quite as you have a common interest and it is in group.
We3 - AI that finds you the most compatible people nearby
PenPal World - Connect with people all over the world
Meetup for iOS and Android - Discover groups that are all about the things you love
InterPals - InterPals is a friendly community of over 5 million friends, language learners, travelers and penpals.
Yubo: Make real friends live - Yubo: Make real friends live is a social networking app to enable you to start a live video chat with up to 10 different users at the same time by sending the link of the chat to them.
Anygram - Anygram app offers features that let you meet new people so you can make new foreign friends practice native languages to learn something new.