A free tool visualizing scientific research areas and trends through timeline graphs and bar charts, allowing users to locate other experts in a field of study and browse article results.
U. Schäfer, B. Kiefer, C. Spurk, J. Steffen, and R. Wang. Proceedings of the ACL-HLT 2011 System Demonstrations, page 7--13. Portland, Oregon, Association for Computational Linguistics, (June 2011)