Tracks social media sites, newspapers, and magazines. Altmetrics is based on three main factors: the number of individual mentioning a paper, where the mentions occurred (e.g. newspaper, a tweet), and how often the author of each mention talks about scholarly articles. Altmetric has been adopted by Springer, Nature Publishing Group, Scopus, and BioMed Central, among others. Altmetrics offers a free bookmarklet that can be added to the bookmarks toolbar and used to get altmetrics on articles with Digital Object Identifiers (DOIs) or identifiers in open access databases such as PubMed Central or arXiv. Altmetrics will only work on Chrome, Firefox or Safari.

Allows researchers to publish all of their data in a citable, searchable and sharable manner. All data is persistently stored online under the most liberal Creative Commons licence, waiving copyright where possible. This allows scientists to access and share the information from anywhere in the world with minimal friction

Twitter account required for signup. Profiles include an overview, achievements, timeline and publications.

Kudos is a free service through which you can broaden readership and increase the impact of your research. Kudos also provides a unique one-stop shop for multiple metrics relating to your publications: page views, citations, full text downloads and altmetrics. When you explain, enrich and share your work through Kudos, it maps your actions against these metrics in charts that show you which activities are most effective when it comes to increasing the reach and impact of your work.

A social reference manager that tracks readership of scholarly articles posted to the site; manage your research in the cloud and control who you share it with or make it publicly available and citable

Plum Analytics aims to tract metrics for journal articles, book chapters, datasets, presentations, and source code by collecting impact metrics across usage, captures, mentions, social media and citations (fee service).

Custom searches to track the access and reuse of articles published in PLOS journals.