Here is some code that you can use to produce mark-up in microformats.

hCard

• hCard creator

hCalendar

• hCalendar creator

hReview

• hReview creator

XFN

• XFN creator – A Web-based interface for quickly creating a link with the proper XFN values. Available in the following languages:
  • English
  • French (translation by Serge K. Keller)
  • Italian (translation by Serge K. Keller and Cécile Matthey)
  • Spanish-Argentina (translation by Manuel Razzari)
  • Dutch (translation by Jeroen Budts — see related post: XFN 1.1 en XFN Creator)
  • Czech (translation by Josef Petrák)
  • Japanese (translation by Kazuhito Kidachi)
• WordPress – An open-source Weblogging package that offers XFN annotation of its internally-stored list of links.
• Autoxfn – A module for Bloxsom that adds XFN annotations to links in an entry.
• blo.gs – Allows you to add information regarding your relationship to the people behind the blogs in your favorites list.
• MetaFilter – Metafilter users can now add XFN information to their links to other MeFi users.
• JournalSpace – The “friends” area of this service allows the addition of XFN information to the links.
• exefen – A Web-based interface that allows quick XFN annotation of all the links on a page. You can save the result and paste it back into your HTML source.
• Nvu – Integrates XFN editing into its hyperlink editing dialogs.