Nltk

NLTK:
* switched to Apache License, Version 2.0
* minor bugfixes in semantics and inference packages
* support for Python eggs
* fixed stale regression tests

Data:
* added NomBank 1.0
* uppercased feature names in some grammars

NLTK:
* several bugfixes
* added nombank corpus reader (Paul Bedaride)

NLTK:
* minor bugfixes and optimizations for parsers, updated some doctests
* added bottom-up filtered left corner parsers,
LeftCornerChartParser and IncrementalLeftCornerChartParser.
* fixed dispersion plot bug which prevented empty plots

NLTK:
* major refactor of chart parser code and improved API (Peter Ljungl喃)
* added new bottom-up left-corner chart parser strategy
* misc bugfixes (ChunkScore, chart rules, chatbots, jcn-similarity)
* improved efficiency of "import nltk" using lazy module imports
* moved CCG package and ISRI Arabic stemmer from NLTK-Contrib into core NLTK
* misc code cleanups

Contrib:
* moved out of the main NLTK distribution into a separate distribution

Book:
* Ongoing polishing ahead of print publication

NLTK:
* Finalized API for NLTK 2.0 and the book, incl dozens of small fixes
* Names of the form nltk.foo.Bar now available as nltk.Bar
for significant functionality; in some cases the name was modified
(using old names will produce a deprecation warning)
* Bugfixes in downloader, WordNet
* Expanded functionality in DecisionTree
* Bigram collocations extended for discontiguous bigrams
* Translation toy nltk.misc.babelfish
* New module nltk.help giving access to tagset documentation
* Fix imports so that NLTK builds without Tkinter (Bjorn Maeland)

Data:
* new maxent NE chunker model
* updated grammar packages for the book
* data for new tagsets collection, documenting several tagsets
* added lolcat translation to the Genesis collection

Contrib (work in progress):
* Updates to coreference package (Joseph Frazee)
* New ISRI Arabic stemmer (Hosam Algasaier)
* Updates to Toolbox package (Greg Aumann)

Book:
* Substantial editorial corrections ahead of final submission

NLTK:
* New off-the-shelf tokenizer, POS tagger, and named-entity tagger
* New metrics package with inter-annotator agreement scores,
distance metrics, rank correlation
* New collocations package (Joel Nothman)
* Many clean-ups to WordNet package (Steven Bethard, Jordan Boyd-Graber)
* Moved old pywordnet-based WordNet package to nltk_contrib
* WordNet browser (Paul Bone)
* New interface to dependency treebank corpora
* Moved MinimalSet class into nltk.misc package
* Put NLTK applications in new nltk.app package
* Many other improvements incl semantics package, toolbox, MaltParser
* Misc changes to many API names in preparation for 1.0, old names deprecated
* Most classes now available in the top-level namespace
* Work on Python egg distribution (Brandon Rhodes)
* Removed deprecated code remaining from 0.8.* versions
* Fixes for Python 2.4 compatibility

Data:
* Corrected identifiers in Dependency Treebank corpus
* Basque and Catalan Dependency Treebanks (CoNLL 2007)
* PE08 Parser Evaluation data
* New models for POS tagger and named-entity tagger

Book:
* Substantial editorial corrections