Mendeley announced in its blog that Elsevier aquired Mendeley last week. They has immediatly promised to continue with the free version of Mendeley and doubled everyone’s storage space at no cost. So Mendeley seems to continue as a standalone platform but Elsevier’s products (Scopus and ScienceDirect) will become interoperable with Mendeley.
Mendeley is both a desktop and a web reference management program for managing and sharing references and research papers. It combines Mendeley Desktop, a PDF and reference management application and Mendeley Web, an online social network for researchers.