3 links
Infogistics Parser/Chunker
infogistics.com
Online demo of a system that tags and chunks English into phrases. Freely downloadable for research purposes.
Machinese Phase Tagger
connexor.com
Online demo of this constraint grammar-based tagger for English, French, Spanish, German, Dutch, Italian and Finnish,
TreeTagger
ims.uni-stuttgart.de
A language independent part-of-speech tagger, available in versions adapted to German and to English. Documentation, downloads, license information, demos.