The best alternatives to backstitch are Listory, Stampsy, and Bookshlf. If these 3 options don't work for you, we've listed a few more alternatives below.
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Listory, the world's first content refinery, extracts the most relevant and meaningful stories, specifically for you. With Listory you can organize and share the content you treasure and save stories to read on your time.
DrumUp is a mobile and web application developed for professionals and businesses for content discovery, curation and social media management. The application can be signed into using Twitter, Facebook or LinkedIn.
Known allows any number of users to post to a shared site with blog posts, status updates, photographs, and more.
Its robust open source framework can be used to build fully-fledged community sites, or a blog for a single user. It's up to you.
Rigel is a multimedia content aggregator (articles and videos, and coming soon podcasts) with the goal of delivering curated and validated content about different topics (History, Science, etc) that you can easily consume on your smartphone, wherever you want.