2. MetanlSome convenient natural language tools that build on NLTK.
3. Divisi2A Python library for learning from dimensionality reduction, supporting sparse and dense matrices.
4. SimplenlpLightweight, multilingual natural language processing
6. ConceptnetConceptNet: a semantic network of common sense knowledge
7. luminosoA visualizer for multi-dimensional semantic data
8. omcsThe meta-repository for the Open Mind Common Sense project.