Craig Upright has written numerous modes for Alpha and has improved Alpha's documentation. You can find (and download) Craig's Alpha offerings at his Alpha Support page.
See also Features.NewPackageAnnouncements for previously advertised packages.
Beginning in March, 2005, my involvement with AlphaTcl will be limited. I'll be focusing primarily on my dissertation until it has been submitted.
I'll still be available for questions/comments/suggestions, and will address any bugs in the packages that I'm currently maintaining, but I am no longer taking on any new projects.