The following is from Greg's blog:
Concorder Pro: This tool is a bit buggy but I still use it to navigate mini text archives using concordance to browse by words alphabetically or by count. Once you get beyond stop words, it gets very interesting. This app was last updated in 2003 and for OS X mac only. Concordance provides the word counts for every word my mini archive.
Other tools that are also very interesting include:
When considering the professional researcher we not only talk about expert search strategies but how the results are really used. Who scans, reads, annotates the ever-increasing overload of relevant information.