NextHub is described as 'allows users to connect and interact in communities centered around shared interests' and is an app in the Photos & Graphics category. There are more than 10 alternatives to NextHub for a variety of platforms, including Online / Web-based, Android, Windows, iPhone and iPad. The best alternative is Reddit, which is free. Other great apps like NextHub are SaidIt.net (Free, Open Source), Ruqqus.com (Free, Open Source), Aether (Freemium, Open Source) and Raddle (Free, Open Source).
Reddit (stylized in its logo as reddit) is an American social news aggregation, web content rating, and discussion website. Registered members submit content to the site such as links, text posts, and images, which are then voted up or down by other members.
Uncensored free speech alternative to the extreme Reddit and Voat forums, democratically civilized by Graham's Debate Pyramid, no illegal transactions nor porn. Truth-seeking anti-corruption news are among the popular themes. Android app, iOS soon.
Unsatisfied with the few link sharing communities that were available and their proprietary, untransparent and non-secure nature, ziq made the original raddle.me (then known as raddit.me) with Wordpress, but it had a lot of limitations.