Some of this moved around the 27th of October, so you might want to update your bookmarks.
Watcom C/C++ product page - product information on Watcom C/C++
Watcom C/C++ Technical Support Home - links to support for Watcom C/C++.
WebExpress - report/track bugs and enhancement requests.
powersoft.public.watcom_c_c++.general - Watcom C/C++ Newsgroup at forums.powersoft.com
Watcom C/C++ Infobases - searchable questions and answers.
Watcom C/C++ Software Libraries - see here for samples and patches.
Watcom C/C++ v11.0 Library - patches for the latest version.