T-Rex (Trainable Relation Extraction).
Tools for document classification, entity and relation (read association) extraction.
Topic maps of any size are going to be constructed from mining of “data” and in a lot of cases that will mean “documents” (to the extent that is a meaningful distinction).
Interesting toolkit for that purpose but apparently not being maintained. Parked at Sourceforge after having been funded by the EU.
Does anyone have a status update on this project?