"... everyone should be able to review each other's work, not just the elected few. This is why PaperCritic now offers researchers a way of obtaining and providing feedback for each others work in a fully open and transparent environment." Powered by Mendeley.
"Check which articles are seeing the most buzz from social media sites, newspapers and in online reference managers." Mashes data collected by altmetrics for papers published by PLoS data.
This is a social framework based on crowdsourced annotations of scholars,"designed to keep up with the rapidly evolving disciplinary and interdisciplinary landscape." It applies Google Scholar data to its "social tool to facilitate citation analysis and help evaluate the impact of an author's publications."