COM/DCOM/ATL Links

Don Box's page - some interesting samples, YACL (COM library)
Keith's COM Sample Gallery - many hooks and other
DCOM Tools and Samples - tools and samples from Mike Nelson, DCOM Bridge, TLB registration, Performance testing utility. Very interesting!
Cris's Dveloper Tools - articles on GIT, marshalling; samples, tools, links
ComDeveloper - interesting articles on COM and COM+, lot of links
COM/DCOM Resources of Yi-Min Wang - many links to source code, articles and other
Reliable Software - Tutorials, articles and samples related to COM and C++

The World Of ATL - covers basics of ATL programming, lot of tools, extensions, bug fixes and other information. Very good!
COM page - ATL and ADO samples

ActiveX made simple - ActiveX tutorial
ActiveX.Com - CNet ActiveX controls mega-site.
Active-X.Com - controls library
Unofficial ActiveX guide - takes you through all steps of creating ActiveX controls, explains the basics of scripting; articles, samples and more
Developer.Com ActiveX links directory - many links to samples, articles, libraries.

COM homepage
Archives of DCOM - DCOM mailing list archive, tons of useful information, search available.
MSKB ActiveX and OLE Articles