TreebankAnalytics is a collection of NLP tools that helps you compute valuable information on graphbanks (deep syntatic treebanks, PropBank, etc.), evaluate system outputs against references or convert one format to another.

DepAnnotator is an annotation tool designed to annotate dependency graphs such as predicate-argument structures. It can also be used to annotate dependency trees. It is based on the Qt Framework to be fully cross-platform.

OGRE stands for Optimized Graph Rewriting Engine. It is a graph rewriting system designed for rewriting syntactic trees into semantic graphs.