The folks at Blogmost.com developed this infographic and named it Little Known Ways to Build High Quality Backlinks in 2014. I'm not sure I like that title… I don't think companies should focus on building links anymore. Our local search experts at Site Strategics like to say that new strategies require earning links rather than actively building them.
More importantly, I believe this infographic combines a ton of tools and distribution sites where you can reach multiple audiences. Distribution, promotion and repurposing content is an effective means of getting a greater return on your content investment… and this is a fantastic list of social, video, audio, podcast, syndication, aggregation, presentation, document, PDF, e-book, business listing, CSS, image, press release, infographic and web submission sites.
They've also added a great selection of social media, audit, keyword analysis, keyword rank, link management, backlink research, email and other search engine optimization tools.