Several of the tools / resources listed on this site were described before on the Linguistic Annotation Wiki maintained from 2007 to 2011 by Thomas Schmidt and Kai Wörner, and a number of the pages here are based on theirs and have benefited a lot from integrating the information. We are grateful for their permission to use their work, and for Thomas Schmidt and Kai Wörner having agreed to further contribute to this site.
The Linguistic Annotation Wiki, in turn, was based on these webpages:
These are no longer maintained. Used with permission to the Linguistic Annotation Wiki.