You may test AS Keyword Generator with a special file - test_for_askw.html (it is included in the setup archive). The file contains all common used tags.

Major Features:

• easy to use
• multifiles processing
• support user defined keywords via <k> tag
• selecting tags for processing
• processing document at once
• processing digits as the letters
• filtering by length and minimal meets word
• stop word list
• user defined keywords
• managing keywords list
• managing stop list of words
• keywords sort: alphabetical or random
• collecting keywords from different documents
• generating keywords without "meta name=..." (useful for export to other application, see screenshot)
• backup document
• inserting meta tag to source document
• install and uninstall
• calculation of frequency of words' mention in a document
• sorting of the list of words according the alphabet or frequency of a mention, in the ascending or descending order
• defining keywords separator
• changing first letter of keywords to upper case

Features are enabled in registered version only

• any quantity of keywords
• replacing existing keywords tag(s)
• managing order of keywords
• changing quantity of the letters in a word for filtering
• no nag screen

• After tuning software you can increase speed of processing. 
  Set "Get words after open" and "Generate at once" checkboxes, open document - keywords will be generated and pasted automatically.
• You can collect keywords from documents and save it to file for  usage (doorways, etc).