This page contains various evaluation benchmarks developed and released (as open source) by researchers working in the field of semantics (in no particular order). If you know of a resource that should be present here, please drop me an email.
Part-of-Speech Tagging, Phrase Chunking and Named Entity Recognition with Python NLTK. Taggers and chunkers trained on treebank, brown, conll2000, ieer.
On January 8, 1923, computer scientist Joseph Weizenbaum, a pioneer in natural language processing and artificial intelligence, who later became one of artificial intelligence's leading critics, was born. In 1966 he published a simple program named Eliza, which involved its users in a conversation that bore a striking resemblance to one with a psychologist.
Natural Language systems have evolved tremendously in the past few years from dealing only with small handcrafted examples to extremely large, real-world applications.