13. MyMFB. Created as a Muslim alternative to Facebook (it was previously called MillatFacebook), this site aims to connect the faith’s 1.5+ billion followers into a single social platform. While that might sound ambitious, it’s growing quickly and offers many of the same post, update, and sharing features as the original Facebook, and is already immensely popular in some parts of the world.

14. YouTube. As a video sharing service, YouTube has become so popular that its catalog of billions and billions of videos has become known as “the world’s second-largest search engine” in some circles. The site has everything from first-person product reviews to promotional clips and “how-two” instruction on virtually any topic or discipline. Users have the ability to share, rate, and comment on what they see.

15. Instagram. If you’re looking for a quick, convenient connection between the camera feature on your smart phone and all your social profiles, then Instagram is the answer. Not only will allow you to share via Twitter, Facebook, and the Instagram website, you can choose from a variety of photo filters and invite friends to comment on your photos or ideas.

16. Vine. This site (also available as an app) offers users the chance to share and view brief video clips. While that theoretically offers a virtually endless range of uses, most of Vine’s content is entertainment-focused, with a heavy preference towards “viral” and “meme” clips that are easy to share.

17. WhatsApp. The WhatsApp concept is simple: send text-style messages to anyone else using the platform, but without paying data charges. That straightforward idea has already gathered more than 700 million fans, making the app the world’s most popular messaging platform.

18. vk.com. Promoting itself as Europe’s largest social media site, vk.com is essentially the Russian version of Facebook, with the same kinds of profiles, messaging, and games you would expect. Like Facebook, vk.com allows users to enter both personal and professional information about themselves, and to follow or show support for organizations and businesses.

19. Meetup. Meetup is a perfectly-named platform, because it’s perfect for organizing local groups around specific interests. There are meetups centered on just about everything, from music to hobbies, and get-togethers are almost always open to newcomers. That makes it perfect for exploring an interest and making new friends at the same time.

20. Secret. This might be the best social media app most people haven’t tried. The premise is simple: join into a group of friends (or create your own), and then share an anonymous message. It’s great for fun interactions, idea starters, or just finally getting something off your chest. (Editor’s note, 5/13/2015: Secret has folded. Co-founder David Byttow writes: “After a lot of thought and consultation with our board, I’ve decided to shut down Secret. Over time, I plan to publish postmortems so that others can learn from the unique mistakes and challenges we faced and the wisdom gained from such an incredible 16 months.”)

21. Medium. If you’ve ever wished that social engagement could come with an ongoing, up-to-date “how to” manual written by the experts, Medium might be just what you’re looking for. With lots of helpful advice, tips, and articles, it can give you everything you need to start connecting like a pro

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