Kudos - a free platform for researchers to increase the visibility and usage of their publications. You can authorize Kudos to post information about your publications to Twitter, Facebook, and LinkedIn or generate trackable links for you to include in posts or emails. The author dashboard provides information about shares, views, downloads, Altmetric scores, and Web of Science citations.
See "Kudos Promises to Help Scientists Promote their Papers to New Audiences." Nature, August 1, 2016.
The Conversation - Ohio State is a founding university partner with The Conversation, a website that publishes articles by academics with expert knowledge of timely, evidence-based issues making the news. Pitch your ideas directly to the editors. Once your idea is accepted, The Conversation will work with you to produce your story (typically 800 to 1,000 words) for publication.
New Books Network - a collection of author-interview podcasts hosted by Amherst College Press. They produce about 100 podcasts per month, most of which are university press books, and have an average of 30,000 downloads per day. You can pitch your book to the network at https://newbooksnetwork.com/publicize-your-book-on-the-nbn/.
People Behind the Science - a podcast "focused on the people doing fascinating research through interviews with top scientists." You can recommend a scientist to be interviewed at firstname.lastname@example.org.
Mendeley - a reference manager with social aspects. You can keep track of citations you are interested in as well as your own, follow other researchers or topic groups, get recommendations on what to read,and upload and monitor downloads of your publications. Altmetric information usually reports the number of Mendeley readers a publication has had.
ResearchGate - a professional network for scientists and researchers. It allows you to set up a profile listing your research publications, interests, expertise, and current projects, follow other researchers of interest, and ask research-related questions of other users.
See "Is ResearchGage Facebook for Science?", Science, August 15, 2014
Academia.edu - a researcher profile site that allows you to connect with other researchers and share your publications through uploads, not just linking. In fact, the signup process attempts to get you to upload copies as soon as possible. Academia.edu has been subject to a lot of criticism (see "Scholars Criticize Academia.edu Proposal to Charge Authors for Recommendations" and "Should You Share your Research on Academic.edu?") but is popular.
The following are tips from Juan Pablo Alperin and Alessandra Bordini at SciDevNet. See the full post for more details.
Make your research discoverable
Track your reach
Connect with your audience
Make your research as widely and openly accessible as possible by humans and machines