You can get a more recent version at my website. There are also some free extra downloads (programs, word lists, etc.) there too. And links to sources of free text corpora.
visit http://www.lexically.net/wordsmith/step_by_step/index.html for screenshots of what WordSmith Tools can do. This may give you useful ideas for your own research and will give you a better idea of the limitations of WordSmith too!
Visit http://www.lexically.net/wordsmith/purchasing.htm for details of suppliers.
Complaints & Suggestions
Best of all, join Google Groups WordSmith Tools group and post your idea there so others can see the discussion. Or email me (mike (at) lexically.net). Please give me as full a description of the problem you need to tackle as you can, and details of the equipment too. Please don't include any attachments over 200K in size. I do try to help but cannot promise to…