F-EXT-WS is a web based Natural Language Processor. This system is developed and maintained by LEARN research group at Computer Science Department of PUC-Rio, Brazil.
If you want some help about how to use F-EXT-WS, see the article F-EXT-WS Documentation at LEARN Web page. In this page, we also present the list of scientific papers related to F-EXT-WS processors and a summary of their evaluated performance.
You can download annotated corpora for some F-EXT-WS tasks in the LEARN homepage.