MeetMe - Location-based social networking app for meeting singles.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Zoosk - If you find that it's hard to meet new people, especially if you're looking for someone to date, then Zoosk is an app that you want to try. You can create a profile with pictures and a little information about yourself that others will read.
LanguageBeast.com - Study English synonyms and antonyms to enrich your vocabulary
LOVOO - LOVOO is a mobile app that was designed specifically to help single people find matches. It was first launched in 2012, and it has attracted a wide base of users in that time. Read more about LOVOO.
Babble - A more personalized social network